ibruce/courses/ee3ba3_2011/ee... · 2 . 3 . 4 •what are contact lenses? •why contacts and not...
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1
2
3
4
bull What are contact lenses
bull Why contacts and not glasses
bull What are they made of and how have they changed
bull What kind of contacts
bull How are they made
bull Biocompatibility with contact lenses
bull What are the current issues with contact lenses
5
bull Comfort
6
1508 1936
1887 1949
1971
1959 first contact lens were and it covered the entire eyes ndash Scleral Contact Lenses
Leonardo da Vinci introduced the concept of contact lenses
1999
Plastic lenses were developed
Plastic contact lenses that made are to cover only the eyersquos cornea - Corneal Lenses (Hard lenses)
Hydrophilic gel introduced
Soft lenses were introduced
First Silicone Hydrogel Contact Lenses were introduced
7
bull Sclearal Lens (1887)
ndash Too heavy
bull Plastic Lens (1936)
ndash Still covered entire eye
bull Corneal Lens (1949)
ndash Unable to wear for long periods of time
bull Non Gas Permeable Lens
ndash PMMA (polymethyl methacrylate)
8
bull Visual Acuity bull Biocompatibility
ndash Tear film ndash Hydrophilic ndash Biofilm resistance
bull Wetabilityoxygen permeability ndash At least semi-permeable measured in (DKL)
bull Size amp gravity weight ndash Lightweight ndash Appropriate modulus of elasticity
9
bull Manufacturing process ndash Ensure the lens are highly pure ndash Every lens should undergo quality testing
bull Affordable price ndash Buy at a reasonable cost if made the lens cheaply and
efficiently
10
bull Also known as lsquohardrsquo lenses
bull Moderately hydrophobic
bull Typical oxygen permeability of 05 DK
bull Good outdoor weathering properties and rigidity
bull Canrsquot be used for more than 8 hours at a time
11
bull HEMA substituted with monomers glycerol methacrylate (GMA)
ndash shows a higher resistance biofilm formation
bull oxygen permeability of about 15-25 Barrers (DK)
12
bull High bond strength
bull Resists temperature extremes weathering aging oxidation moisture many chemicals and ultraviolet radiation
bull High Breathability
bull hydrophobic
13
The modified version of Henryrsquos law for polymers below their glass transition temperature
Fickrsquos law for glassy polymers is
14
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
2
3
4
bull What are contact lenses
bull Why contacts and not glasses
bull What are they made of and how have they changed
bull What kind of contacts
bull How are they made
bull Biocompatibility with contact lenses
bull What are the current issues with contact lenses
5
bull Comfort
6
1508 1936
1887 1949
1971
1959 first contact lens were and it covered the entire eyes ndash Scleral Contact Lenses
Leonardo da Vinci introduced the concept of contact lenses
1999
Plastic lenses were developed
Plastic contact lenses that made are to cover only the eyersquos cornea - Corneal Lenses (Hard lenses)
Hydrophilic gel introduced
Soft lenses were introduced
First Silicone Hydrogel Contact Lenses were introduced
7
bull Sclearal Lens (1887)
ndash Too heavy
bull Plastic Lens (1936)
ndash Still covered entire eye
bull Corneal Lens (1949)
ndash Unable to wear for long periods of time
bull Non Gas Permeable Lens
ndash PMMA (polymethyl methacrylate)
8
bull Visual Acuity bull Biocompatibility
ndash Tear film ndash Hydrophilic ndash Biofilm resistance
bull Wetabilityoxygen permeability ndash At least semi-permeable measured in (DKL)
bull Size amp gravity weight ndash Lightweight ndash Appropriate modulus of elasticity
9
bull Manufacturing process ndash Ensure the lens are highly pure ndash Every lens should undergo quality testing
bull Affordable price ndash Buy at a reasonable cost if made the lens cheaply and
efficiently
10
bull Also known as lsquohardrsquo lenses
bull Moderately hydrophobic
bull Typical oxygen permeability of 05 DK
bull Good outdoor weathering properties and rigidity
bull Canrsquot be used for more than 8 hours at a time
11
bull HEMA substituted with monomers glycerol methacrylate (GMA)
ndash shows a higher resistance biofilm formation
bull oxygen permeability of about 15-25 Barrers (DK)
12
bull High bond strength
bull Resists temperature extremes weathering aging oxidation moisture many chemicals and ultraviolet radiation
bull High Breathability
bull hydrophobic
13
The modified version of Henryrsquos law for polymers below their glass transition temperature
Fickrsquos law for glassy polymers is
14
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
3
4
bull What are contact lenses
bull Why contacts and not glasses
bull What are they made of and how have they changed
bull What kind of contacts
bull How are they made
bull Biocompatibility with contact lenses
bull What are the current issues with contact lenses
5
bull Comfort
6
1508 1936
1887 1949
1971
1959 first contact lens were and it covered the entire eyes ndash Scleral Contact Lenses
Leonardo da Vinci introduced the concept of contact lenses
1999
Plastic lenses were developed
Plastic contact lenses that made are to cover only the eyersquos cornea - Corneal Lenses (Hard lenses)
Hydrophilic gel introduced
Soft lenses were introduced
First Silicone Hydrogel Contact Lenses were introduced
7
bull Sclearal Lens (1887)
ndash Too heavy
bull Plastic Lens (1936)
ndash Still covered entire eye
bull Corneal Lens (1949)
ndash Unable to wear for long periods of time
bull Non Gas Permeable Lens
ndash PMMA (polymethyl methacrylate)
8
bull Visual Acuity bull Biocompatibility
ndash Tear film ndash Hydrophilic ndash Biofilm resistance
bull Wetabilityoxygen permeability ndash At least semi-permeable measured in (DKL)
bull Size amp gravity weight ndash Lightweight ndash Appropriate modulus of elasticity
9
bull Manufacturing process ndash Ensure the lens are highly pure ndash Every lens should undergo quality testing
bull Affordable price ndash Buy at a reasonable cost if made the lens cheaply and
efficiently
10
bull Also known as lsquohardrsquo lenses
bull Moderately hydrophobic
bull Typical oxygen permeability of 05 DK
bull Good outdoor weathering properties and rigidity
bull Canrsquot be used for more than 8 hours at a time
11
bull HEMA substituted with monomers glycerol methacrylate (GMA)
ndash shows a higher resistance biofilm formation
bull oxygen permeability of about 15-25 Barrers (DK)
12
bull High bond strength
bull Resists temperature extremes weathering aging oxidation moisture many chemicals and ultraviolet radiation
bull High Breathability
bull hydrophobic
13
The modified version of Henryrsquos law for polymers below their glass transition temperature
Fickrsquos law for glassy polymers is
14
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
4
bull What are contact lenses
bull Why contacts and not glasses
bull What are they made of and how have they changed
bull What kind of contacts
bull How are they made
bull Biocompatibility with contact lenses
bull What are the current issues with contact lenses
5
bull Comfort
6
1508 1936
1887 1949
1971
1959 first contact lens were and it covered the entire eyes ndash Scleral Contact Lenses
Leonardo da Vinci introduced the concept of contact lenses
1999
Plastic lenses were developed
Plastic contact lenses that made are to cover only the eyersquos cornea - Corneal Lenses (Hard lenses)
Hydrophilic gel introduced
Soft lenses were introduced
First Silicone Hydrogel Contact Lenses were introduced
7
bull Sclearal Lens (1887)
ndash Too heavy
bull Plastic Lens (1936)
ndash Still covered entire eye
bull Corneal Lens (1949)
ndash Unable to wear for long periods of time
bull Non Gas Permeable Lens
ndash PMMA (polymethyl methacrylate)
8
bull Visual Acuity bull Biocompatibility
ndash Tear film ndash Hydrophilic ndash Biofilm resistance
bull Wetabilityoxygen permeability ndash At least semi-permeable measured in (DKL)
bull Size amp gravity weight ndash Lightweight ndash Appropriate modulus of elasticity
9
bull Manufacturing process ndash Ensure the lens are highly pure ndash Every lens should undergo quality testing
bull Affordable price ndash Buy at a reasonable cost if made the lens cheaply and
efficiently
10
bull Also known as lsquohardrsquo lenses
bull Moderately hydrophobic
bull Typical oxygen permeability of 05 DK
bull Good outdoor weathering properties and rigidity
bull Canrsquot be used for more than 8 hours at a time
11
bull HEMA substituted with monomers glycerol methacrylate (GMA)
ndash shows a higher resistance biofilm formation
bull oxygen permeability of about 15-25 Barrers (DK)
12
bull High bond strength
bull Resists temperature extremes weathering aging oxidation moisture many chemicals and ultraviolet radiation
bull High Breathability
bull hydrophobic
13
The modified version of Henryrsquos law for polymers below their glass transition temperature
Fickrsquos law for glassy polymers is
14
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull What are contact lenses
bull Why contacts and not glasses
bull What are they made of and how have they changed
bull What kind of contacts
bull How are they made
bull Biocompatibility with contact lenses
bull What are the current issues with contact lenses
5
bull Comfort
6
1508 1936
1887 1949
1971
1959 first contact lens were and it covered the entire eyes ndash Scleral Contact Lenses
Leonardo da Vinci introduced the concept of contact lenses
1999
Plastic lenses were developed
Plastic contact lenses that made are to cover only the eyersquos cornea - Corneal Lenses (Hard lenses)
Hydrophilic gel introduced
Soft lenses were introduced
First Silicone Hydrogel Contact Lenses were introduced
7
bull Sclearal Lens (1887)
ndash Too heavy
bull Plastic Lens (1936)
ndash Still covered entire eye
bull Corneal Lens (1949)
ndash Unable to wear for long periods of time
bull Non Gas Permeable Lens
ndash PMMA (polymethyl methacrylate)
8
bull Visual Acuity bull Biocompatibility
ndash Tear film ndash Hydrophilic ndash Biofilm resistance
bull Wetabilityoxygen permeability ndash At least semi-permeable measured in (DKL)
bull Size amp gravity weight ndash Lightweight ndash Appropriate modulus of elasticity
9
bull Manufacturing process ndash Ensure the lens are highly pure ndash Every lens should undergo quality testing
bull Affordable price ndash Buy at a reasonable cost if made the lens cheaply and
efficiently
10
bull Also known as lsquohardrsquo lenses
bull Moderately hydrophobic
bull Typical oxygen permeability of 05 DK
bull Good outdoor weathering properties and rigidity
bull Canrsquot be used for more than 8 hours at a time
11
bull HEMA substituted with monomers glycerol methacrylate (GMA)
ndash shows a higher resistance biofilm formation
bull oxygen permeability of about 15-25 Barrers (DK)
12
bull High bond strength
bull Resists temperature extremes weathering aging oxidation moisture many chemicals and ultraviolet radiation
bull High Breathability
bull hydrophobic
13
The modified version of Henryrsquos law for polymers below their glass transition temperature
Fickrsquos law for glassy polymers is
14
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Comfort
6
1508 1936
1887 1949
1971
1959 first contact lens were and it covered the entire eyes ndash Scleral Contact Lenses
Leonardo da Vinci introduced the concept of contact lenses
1999
Plastic lenses were developed
Plastic contact lenses that made are to cover only the eyersquos cornea - Corneal Lenses (Hard lenses)
Hydrophilic gel introduced
Soft lenses were introduced
First Silicone Hydrogel Contact Lenses were introduced
7
bull Sclearal Lens (1887)
ndash Too heavy
bull Plastic Lens (1936)
ndash Still covered entire eye
bull Corneal Lens (1949)
ndash Unable to wear for long periods of time
bull Non Gas Permeable Lens
ndash PMMA (polymethyl methacrylate)
8
bull Visual Acuity bull Biocompatibility
ndash Tear film ndash Hydrophilic ndash Biofilm resistance
bull Wetabilityoxygen permeability ndash At least semi-permeable measured in (DKL)
bull Size amp gravity weight ndash Lightweight ndash Appropriate modulus of elasticity
9
bull Manufacturing process ndash Ensure the lens are highly pure ndash Every lens should undergo quality testing
bull Affordable price ndash Buy at a reasonable cost if made the lens cheaply and
efficiently
10
bull Also known as lsquohardrsquo lenses
bull Moderately hydrophobic
bull Typical oxygen permeability of 05 DK
bull Good outdoor weathering properties and rigidity
bull Canrsquot be used for more than 8 hours at a time
11
bull HEMA substituted with monomers glycerol methacrylate (GMA)
ndash shows a higher resistance biofilm formation
bull oxygen permeability of about 15-25 Barrers (DK)
12
bull High bond strength
bull Resists temperature extremes weathering aging oxidation moisture many chemicals and ultraviolet radiation
bull High Breathability
bull hydrophobic
13
The modified version of Henryrsquos law for polymers below their glass transition temperature
Fickrsquos law for glassy polymers is
14
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
1508 1936
1887 1949
1971
1959 first contact lens were and it covered the entire eyes ndash Scleral Contact Lenses
Leonardo da Vinci introduced the concept of contact lenses
1999
Plastic lenses were developed
Plastic contact lenses that made are to cover only the eyersquos cornea - Corneal Lenses (Hard lenses)
Hydrophilic gel introduced
Soft lenses were introduced
First Silicone Hydrogel Contact Lenses were introduced
7
bull Sclearal Lens (1887)
ndash Too heavy
bull Plastic Lens (1936)
ndash Still covered entire eye
bull Corneal Lens (1949)
ndash Unable to wear for long periods of time
bull Non Gas Permeable Lens
ndash PMMA (polymethyl methacrylate)
8
bull Visual Acuity bull Biocompatibility
ndash Tear film ndash Hydrophilic ndash Biofilm resistance
bull Wetabilityoxygen permeability ndash At least semi-permeable measured in (DKL)
bull Size amp gravity weight ndash Lightweight ndash Appropriate modulus of elasticity
9
bull Manufacturing process ndash Ensure the lens are highly pure ndash Every lens should undergo quality testing
bull Affordable price ndash Buy at a reasonable cost if made the lens cheaply and
efficiently
10
bull Also known as lsquohardrsquo lenses
bull Moderately hydrophobic
bull Typical oxygen permeability of 05 DK
bull Good outdoor weathering properties and rigidity
bull Canrsquot be used for more than 8 hours at a time
11
bull HEMA substituted with monomers glycerol methacrylate (GMA)
ndash shows a higher resistance biofilm formation
bull oxygen permeability of about 15-25 Barrers (DK)
12
bull High bond strength
bull Resists temperature extremes weathering aging oxidation moisture many chemicals and ultraviolet radiation
bull High Breathability
bull hydrophobic
13
The modified version of Henryrsquos law for polymers below their glass transition temperature
Fickrsquos law for glassy polymers is
14
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Sclearal Lens (1887)
ndash Too heavy
bull Plastic Lens (1936)
ndash Still covered entire eye
bull Corneal Lens (1949)
ndash Unable to wear for long periods of time
bull Non Gas Permeable Lens
ndash PMMA (polymethyl methacrylate)
8
bull Visual Acuity bull Biocompatibility
ndash Tear film ndash Hydrophilic ndash Biofilm resistance
bull Wetabilityoxygen permeability ndash At least semi-permeable measured in (DKL)
bull Size amp gravity weight ndash Lightweight ndash Appropriate modulus of elasticity
9
bull Manufacturing process ndash Ensure the lens are highly pure ndash Every lens should undergo quality testing
bull Affordable price ndash Buy at a reasonable cost if made the lens cheaply and
efficiently
10
bull Also known as lsquohardrsquo lenses
bull Moderately hydrophobic
bull Typical oxygen permeability of 05 DK
bull Good outdoor weathering properties and rigidity
bull Canrsquot be used for more than 8 hours at a time
11
bull HEMA substituted with monomers glycerol methacrylate (GMA)
ndash shows a higher resistance biofilm formation
bull oxygen permeability of about 15-25 Barrers (DK)
12
bull High bond strength
bull Resists temperature extremes weathering aging oxidation moisture many chemicals and ultraviolet radiation
bull High Breathability
bull hydrophobic
13
The modified version of Henryrsquos law for polymers below their glass transition temperature
Fickrsquos law for glassy polymers is
14
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Visual Acuity bull Biocompatibility
ndash Tear film ndash Hydrophilic ndash Biofilm resistance
bull Wetabilityoxygen permeability ndash At least semi-permeable measured in (DKL)
bull Size amp gravity weight ndash Lightweight ndash Appropriate modulus of elasticity
9
bull Manufacturing process ndash Ensure the lens are highly pure ndash Every lens should undergo quality testing
bull Affordable price ndash Buy at a reasonable cost if made the lens cheaply and
efficiently
10
bull Also known as lsquohardrsquo lenses
bull Moderately hydrophobic
bull Typical oxygen permeability of 05 DK
bull Good outdoor weathering properties and rigidity
bull Canrsquot be used for more than 8 hours at a time
11
bull HEMA substituted with monomers glycerol methacrylate (GMA)
ndash shows a higher resistance biofilm formation
bull oxygen permeability of about 15-25 Barrers (DK)
12
bull High bond strength
bull Resists temperature extremes weathering aging oxidation moisture many chemicals and ultraviolet radiation
bull High Breathability
bull hydrophobic
13
The modified version of Henryrsquos law for polymers below their glass transition temperature
Fickrsquos law for glassy polymers is
14
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Manufacturing process ndash Ensure the lens are highly pure ndash Every lens should undergo quality testing
bull Affordable price ndash Buy at a reasonable cost if made the lens cheaply and
efficiently
10
bull Also known as lsquohardrsquo lenses
bull Moderately hydrophobic
bull Typical oxygen permeability of 05 DK
bull Good outdoor weathering properties and rigidity
bull Canrsquot be used for more than 8 hours at a time
11
bull HEMA substituted with monomers glycerol methacrylate (GMA)
ndash shows a higher resistance biofilm formation
bull oxygen permeability of about 15-25 Barrers (DK)
12
bull High bond strength
bull Resists temperature extremes weathering aging oxidation moisture many chemicals and ultraviolet radiation
bull High Breathability
bull hydrophobic
13
The modified version of Henryrsquos law for polymers below their glass transition temperature
Fickrsquos law for glassy polymers is
14
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Also known as lsquohardrsquo lenses
bull Moderately hydrophobic
bull Typical oxygen permeability of 05 DK
bull Good outdoor weathering properties and rigidity
bull Canrsquot be used for more than 8 hours at a time
11
bull HEMA substituted with monomers glycerol methacrylate (GMA)
ndash shows a higher resistance biofilm formation
bull oxygen permeability of about 15-25 Barrers (DK)
12
bull High bond strength
bull Resists temperature extremes weathering aging oxidation moisture many chemicals and ultraviolet radiation
bull High Breathability
bull hydrophobic
13
The modified version of Henryrsquos law for polymers below their glass transition temperature
Fickrsquos law for glassy polymers is
14
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull HEMA substituted with monomers glycerol methacrylate (GMA)
ndash shows a higher resistance biofilm formation
bull oxygen permeability of about 15-25 Barrers (DK)
12
bull High bond strength
bull Resists temperature extremes weathering aging oxidation moisture many chemicals and ultraviolet radiation
bull High Breathability
bull hydrophobic
13
The modified version of Henryrsquos law for polymers below their glass transition temperature
Fickrsquos law for glassy polymers is
14
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull High bond strength
bull Resists temperature extremes weathering aging oxidation moisture many chemicals and ultraviolet radiation
bull High Breathability
bull hydrophobic
13
The modified version of Henryrsquos law for polymers below their glass transition temperature
Fickrsquos law for glassy polymers is
14
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
The modified version of Henryrsquos law for polymers below their glass transition temperature
Fickrsquos law for glassy polymers is
14
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Hard lenses (RGP)
bull Soft lenses
bull Extended-wear
bull Disposable
bull Cosmetic lens (color lens)
15
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Rigid Gas Permeable lens (RGP) bull Methacryloxypropyl tris(trimethysiloxy silane)
(TRIS) co polymerized with MMA ndash Results in oxygen permeability of silicone ndash Doped with fluoromethacrylates
bull Methacrylic acid (MAA) added to increase lens wetability
bull consist of an amorphous three dimensional polymer matrix (typically a MMA derivative) that is below its glass transition temperature
16
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull First soft lenses were made with poly hydroxyethyl methacrylate (pHEMA)
bull range from low oxygen permeability to high oxygen permeability
bull Consists of a three dimensional amorphous network with cross-links that is above its glass transition temperature
17
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Oxygen permeability of the lens is proportional to the amount of water in the lens
bull As the water content is increased the polymers lose their strength
18
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
RGP Lenses Soft Lenses
Visibility Clear and sharp Less sharp
Durability Long Short in relation to other lenses
Comfort Rigid Comfortable for long wear
Adaptation Long period Short period
Care Personal time extensive Short personal time duration
Biofilm resistance Highly resistant Collects deposits
19
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Made of polymethyl methacrylate (PMMA)
bull Covered the entire of cornea
bull very stiff and has a high elasticity modulus
20
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Latest development in soft contact lens materials
bull DK of 600 Barres
bull Retains the comfort and resistance of wetability and biofilm
bull a greater propensity to attract and collect lipid deposits
bull Better overall eye health
21
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Oxygen permeability forms an inverse relationship with water content
22
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Oxygen permeability forms an inverse relationship with water content
23
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Injection molding
bull Lathe Cutting
24
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
25
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
26
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Process in which molten polymer is
forced under high pressure into a mold cavity
27
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
28
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Optical qualities
bull Proper fitting
bull Constant blinking
bull Varying the thickness and shape
29
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Oxygen permeability
bull Hydrophilic
bull Angle of contact
bull Size
bull Thickness
30
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
31
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Microbial Keratitis ndash corneal infection
bull Acanthamoeba Keratitis ndash Due to improper lens handling and poor hygiene
bull Ulcers ndash Due to prolonged wearing of contact lenses and
chemical injury
bull Hypoxia ndash Inadequate oxygen supply due to sleeping with lens
32
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Comfort VS effectiveness
bull Hard lens VS soft lens
bull Amount of care needed
bull Health disorder
bull Adaptability of eyes
bull Do not do make your eyes healthier
33
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Material is always the subject to study for contact lenses
bull investigating different chemical recipes that may give the plastic more desirable characteristics - siloxane
bull Investigation new polymers for scleral lenses
34
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull Many advances have been made to reduce the health impacts of contact lenses on the eye
bull Ideal lens would have moderate visual acuity comfortable extended wear high oxygen permeability no biological impact resistance to outdoor conditions and little care required
35
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull http3bpblogspotcom_akDwxMm7VvIS_sKSSFc35IAAAAAAAABa0tA_7itY0KCQs
1600reading+glassesjpg
bull httpwwwdaviddarlinginfoimagesgas_permeable_contact_lensjpg
bull httpiehowcomimagesa04bcnjlaser-eye-surgery-work-200X200jpg
bull httpwwwabbaeyecarecomimagesclear-visionjpg
bull httpwwwtradekoreacomproductscontact_lenshtml
bull httpchoosingacompanynamecomcontacts-for-stigmatismphp
bull httpwwwyouknowitcomcontact-lens-blogindexphpbad-romance-contact-lenses
bull httpmoneycnncomgalleries2008fortune0805galleryprivate_equity_power_listfortune5html
bull httpwwwcomparestorepricescoukhealth-and-beautybausch-and--lomb-bausch-and-lomb-boston-advance-cleanerasp
bull httpflatpackmicrowavepizzacouklens-scleral-frontjpg
bull httpwwwcorriganopticianscoukassets174CorriganPic_15jpg
bull httplens-logiccomproductionphp
36
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
bull httpwwweyetopicscomarticles171Contact-Lenses-vs-Eyeglasseshtml
bull httpcontact-lens-reviewtoptenreviewscomwho-shouldn-t-wear-contact-lenseshtml
bull httpwwwallaboutvisioncomcontactsfaqwhen-inventedhtm
bull httpezinearticlescomHave-You-Ever-Wondered-How-Do-Contact-Lenses-Workampid=55135
bull httpovidsptxovidcomlibaccesslibmcmastercasp-322bovidwebcgiampS=AHPGFPOBFIDDHFJINCDLCEJCPFPNAA00ampLink+Set=Ssh157c17csl_10
bull httpwwwsubstechcomdokuwikidokuphpid=injection_molding_of_polymers
bull httpwwwengbuffaloeduCoursesce4352001ZGuContact_LensContactLensReporthtm
bull httpwww1-contact-lenses-consumer-guidecomabout-rgphtml
bull httpwwwmadehowcomVolume-2Contact-Lenshtml
37
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