contact lens care & maintence
DESCRIPTION
CONTACT LENS CARE & MAINTENCETRANSCRIPT
![Page 1: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/1.jpg)
ALSALAMA EYE HOSPITAL
CARE AND MAINTENANCE OF CONTACT LENS
![Page 2: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/2.jpg)
Most of the complications with contact lens are because of the poor compliance and improper usage of the care system.
![Page 3: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/3.jpg)
Clean the lens Prevent/ minimize deposits Maintain wettability for comfort and clear vision.
Disinfect lenses to prevent ocular
Inflammation.
![Page 4: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/4.jpg)
Irritation and reduced comfort
Reduced visual acuity Shortened lens life Increased potential for infection
Increased incidence of GPC
![Page 5: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/5.jpg)
![Page 6: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/6.jpg)
Clean • Rinse • DisinfectExtra Steps: • Protein removal • Lubricating / re-wetting drops
![Page 7: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/7.jpg)
Surfactants
• Buffers
• Osmolality adjusting agent(s)
• Preservatives
• Water
![Page 8: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/8.jpg)
Remove deposits by:
- interacting with deposits
- displacing deposits from lens surface
• Emulsify oils and lipids
• Destroy/dislodge micro-organisms
• Prepare lens for rinsing and disinfection
![Page 9: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/9.jpg)
Daily cleaners
Weekly cleaners
![Page 10: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/10.jpg)
Proper cleaning removes 90% of
organisms.
Mostly contains surfactants,viscocity
agent Buffering agent ,preservatives
![Page 11: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/11.jpg)
Enzymatic cleanersEffectively remove protein deposits
Have no effect on most other
deposits React by breaking proteins into smaller molecules
![Page 12: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/12.jpg)
Derived from papaya plant Binds to contact lens materials and can cause sensitivity reactions
Short 15 minute soaking time
possible
![Page 13: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/13.jpg)
• Pig pancreas derivative
• Cleaning efficacy similar to
papain
![Page 14: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/14.jpg)
• Derived from Bacillus bacteria• Low toxicity, used in food products• Less specific binding characteristics
• May be more effective than papain
![Page 15: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/15.jpg)
Removal of loosened lens contaminants
• Removal of residual cleaner
• Rehydrate lens
• Dissolve enzyme tabs
![Page 16: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/16.jpg)
Isotonic
• Buffered
• pH similar to ocular environment
![Page 17: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/17.jpg)
Micro-organism can attach to deposits
Use Thermal & chemical disinfection systems
Soaking time 4 hours to overnight or as
recommended
• Preservatives incorporated
![Page 18: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/18.jpg)
• Thermal (heat)
• Chemical
◦ - conventional
◦ - polymeric
◦ - tablet
• Hydrogen peroxide
![Page 19: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/19.jpg)
Original form of disinfection.
High temperatures kill micro-organisms by:
◦ • Denaturation of cell components
◦ • Disruption of plasma membranes
◦ • DNA damage
![Page 20: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/20.jpg)
Clean and rinse lenses
Place lenses in fresh saline in lens case
Secure lid(s) and place lens case in thermal
disinfecting unit
After heat cycle allow lenses to cool before
use.
![Page 21: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/21.jpg)
• Thimerosal
• Chlorhexidine
• Sorbic Acid
• ATAC
• Isopropyl alcohol
![Page 22: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/22.jpg)
• One-bottle system (OBS)
• Combination of cleaning, disinfecting and soaking functions
• Convenient
![Page 23: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/23.jpg)
• Also known as conditioning solutions
• Functions - disinfection - wetting - storage
![Page 24: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/24.jpg)
Composition:• Antimicrobial agents(s)• Wetting agent• Viscosity-enhancing agent• Buffer system• Salts(s)
![Page 25: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/25.jpg)
Used regularly, after the daily cleaner and rinsing step.
• Lenses should be soaked in enzyme dissolved in solution/saline for 15mins to overnight, depending on manufacturer
• Lenses should be thoroughly rubbed and rinsed again afterwards
![Page 26: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/26.jpg)
Improve the wetting characteristics of thelens surface:
• Convert hydrophobic surface to hydrophilic
• Assist tear film to spread more easily and
evenly on lens surface
• Increase comfort on insertion
![Page 27: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/27.jpg)
Non wetting areas can be due to: • Deposits • Manufacturing process • Polishing compounds • Surface combination
![Page 28: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/28.jpg)
Used during lens wear to: Increase comfort Clean lens surface Maintain lens wettability
![Page 29: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/29.jpg)
Other common solution ingredients:
• Viscosity-enhancing agent(s)
• Buffer(s) - PH
• Osmolality-adjusting agents(s)
![Page 30: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/30.jpg)
Solution toxicity: rare
• Punctuate corneal staining: uncommon
• Viscous solution:
- blurry/fluctuating vision on lens insertion
- may leave residue on lashes
![Page 31: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/31.jpg)
Replace lenses at least annually
Residual deposits can irritate lids, especially the upper lids
![Page 32: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/32.jpg)
Before dispensing:
• Clean and soak lenses overnight
• Verify lenses• Check wettability
![Page 33: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/33.jpg)
Clean with alcohol-based cleaner immediately
after use Place in clean vial (suspending lens if possible)
Wet-store in disinfecting/storage conditioning
solution when not in use (change regularly)
![Page 34: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/34.jpg)
lenses easier to care for
Clean, Rinse And Disinfectant Lenses Every time (CRADLE)
![Page 35: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/35.jpg)
Scrub with a new toothbrush and CL cleaning solution weekly
Rinse with saline or disinfecting solution
Air dry upside-down Replace regularly
![Page 36: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/36.jpg)
Do not mix solution types and brandsReview patient compliance Ask patient to repeat instruction and demonstrate technique and procedure
Observe recommend storage conditions
![Page 37: CONTACT LENS CARE & MAINTENCE](https://reader034.vdocuments.net/reader034/viewer/2022051207/53f6b7968d7f720b428b4844/html5/thumbnails/37.jpg)