SLICK OPTIONS FOR THE RGP SURFACE
MELISSA BARNETT, OD, FAAO, FSLS, FBCLA
HISTORY OF LENSES
GP LENS CHARACTERISTICS
MATERIAL CHEMISTRY
POLYMERIZATION
PMMA
EVOLUTION OF GP MATERIALS
SURFACE PROPERTIES
ARTIFICIAL EYE MAKINGORIGINATED IN EGYPT AROUND 2000 BC TO ENSURE THAT EGYPTIANS COULD SEE IN THE AFTERLIFE
GRADUALLY SPREAD THROUGHOUT EUROPE
BIG BUSINESS!
EYE DAMAGE AND EYE LOSS VERY COMMON DUE TO FREQUENT, SEVERE EYE INFECTIONS
DUE TO POOR HYGIENE
NO ANTIBIOTICS
EMERGING INDUSTRIAL PROCESSES USING LIME AND HOT METALS
NO PROTECTIVE EYEWEAR
CLEAR GLASS SHELLS
1859
WILLIAM WHITE COOPER, LONDON OPHTHALMOLOGIST
GLASS MASKS MADE UP BY ARTIFICIAL EYE MAKERS GRAY AND HOLFORD OF LONDON
SEPARATE THE CORNEA FROM THE LIDS IN CASES OF SYMBLEPHARON
SIMILAR TO SCLERAL LENSES
LACKING AN OPTIC ZONE OVER THE CORNEA
FIRST SCLERAL LENSES
1887
FIRST SCLERAL LENSES MADE BY FREDRICH A. MULLER AND ALEBERT C. MULLER
ARTIFICIAL EYE MAKERS FROM WIESBADEN, GERMANY
PROTECTIVE SHELL WITH A CLEAR CORNEA
BLOWN GLASS CONTACT LENS
THE FIRST CONTACT LENS EMERGED
1888-1889
ADOLF EUGEN GASTON FICK
GERMAN OPHTHALMOLOGIST IN ZURICH
HAD GLASS SCLERAL LENSES MADE BY PROFESSOR ERNST ABBE AT CARL ZEISS IN JENA
ABBE DEVELOPED THE FIRST ZEISS CONTACT LENSES FROM GLASS PRODUCED BY OTTO SCHOTT, THE SON OF A FAMILY OF GLASS MAKERS
FIT CONTACT LENSES TO IRREGULARLY SHAPED CORNEAS
EUGENE KALT
1889
OPHTHALMOLOGIST IN PARIS
CONTACT LENSES AS “ORTHOPEDIC APPLIANCES” IN THE TREATMENT OF KERATOCONUS
OBSERVED THAT THE CONTACT LENS CHANGED THE SHAPE OF THE CORNEA
LAYED THE GROUNDWORK THAT LED TO ORTHOKERATOLOGY AND TO CONTACT LENSES BEING CONSIDERED AS A MEANS OF MYOPIA CONTROL
AUGUST M LLER1889
FINAL YEAR MEDICAL STUDENT
KIEL GERMANY
DISSERTATION ENTITLED “SPECTACLE LENSES AND CORNEAL LENSES” INCLUDED THE CORRECTION OF HIS OWN 14 DIOPTERS OF MYOPIA WITH CONTACT LENSES
FIRST TIME A REFERENCE HAD BEEN MADE TO A “CORNEAL LENS”
DEVELOPMENT OF PMMA1915 - ROHM AND HASS
FIRST DEVELOPED PMMA TO USE IN PAINT AS A PAINT BINDER
1934 - CRAWFORD AND HILL
DEVELOPED AND PATENTED PMMA AS A PLASTIC
PMMA USED AS COCKPIT CANOPIES IN WWII IN UK
1938 – THEODORE OBRIG AND ERNEST MULLEN
MADE FIRST ALL PLASTIC CONTACT LENS “PLEXIGLASS” PMMA IN US
1938 – ISTVAN GY RFFY
FIRST PMMA CONTACT LENSES IN EUROPE
PMMA INTRODUCED AS A PLASTIC FOR CONTACT LENSES
Theodore Obrig
RIGID GAS PERMEABLE (RGP)1979 - FIRST MADE AVAILABLE AS AN ALTERNATIVE TO THE SOFT LENS
IRVING FATT PROVIDED RATIONALE FOR PRODUCING GAS PERMEABLE MATERIALS
STUDIED OXYGEN TENSION AND PERMEABILITY WITH JENNIFER CHASTON, FCOPTOM AND JUDITH MORRIS, FCOPTOM
1977- THE 'HARTFLEX' GAS PERMEABLE CONTACT LENS FITTING SET FROM WÖHLK-CONTACT-LINSEN
FIRST TYPE OF HARD GAS PERMEABLE LENS MANUFACTURED BY COMPRESSION MOULDING FROM CELLULOSE ACETATE BUTYRATE (CAB)
LAUNCHED IN THE UK
Irving Fatt
ARE CORNEAL LENSES DEAD?
“SCLERAL AND CORNEAL RIGID LENSES REPRESENTED 100% OF THE CONTACT LENS MARKET IMMEDIATELY PRIOR TO THE INVENTION OF SOFT LENSES IN THE MID-1960S.”
IN THE UNITED KINGDOM TODAY, RIGID LENSES COMPRISE 2 PER CENT OF ALL NEW LENS FITS.
THE 1998 PREDICTION OF THE AUTHOR THAT RIGID LENSES WOULD BE OBSOLETE BY THE YEAR 2010 HAS ESSENTIALLY TURNED OUT TO BE CORRECT.
RIGID LENSES ARE NOW BEING FITTED BY A MINORITY OF PRACTITIONERS WITH SPECIALIST SKILLS/TRAINING.
“CERTAINLY, RIGID LENSES CAN NO LONGER BE CONSIDERED AS A MAINSTREAM FORM OF CONTACT LENS CORRECTION.”
Efron N. Obituary--rigid contact lenses. Cont Lens Anterior Eye. 2010 Oct;33(5):245-52. doi: 10.1016/j.clae.2010.06.009. Epub 2010 Jul 31.
“NEW FITTINGS ARE INDEED VERY MUCH A SPECIALIST, MINORITY AREA BUT THERE STILL REMAIN AROUND THE WORLD LARGE NUMBERS OF PERFECTLY SUCCESSFUL HARD LENS WEARERS SUPPORTED BY NUMEROUS EQUALLY SUCCESSFUL HARD LENS LABORATORIES”.
- ANDREW GASSON
Gasson A. A response to Nathan Efron. Cont Lens Anterior Eye. 2011 Jun;34(3):149; author reply 150. doi: 10.1016/j.clae.2011.02.015. Epub 2011 Mar 26.
WHICH ARE DO YOU FEEL HAS THE GREATEST POTENTIAL FOR GROWTH IN THE NEXT 12 MONTHS?
“THE SCLERAL EXPLOSION CONTINUES”ED BENNETT, OD, MSED, FAAO CL SPECTRUM OCTOBER 2016
THE EVOLUTION OF RGP MATERIALS 1978 – CELLULOSE ACETATE BUTYRATE
POOR O2 TRANSMISSION AND PRONE TO WARPAGE
1979 – SILICONE/ACRYLATE MATERIAL SILICONE: O2 PERMEABILITY; METHACRYLATE ACID: WETTABILITY
DK 12-60
SIGNIFICANT PROTEIN DEPOSITION
EASILY BROKEN, SCRATCHED
FLEXURE AND PARAMETER INSTABILITY
1987 – FLUOROSILICONE ACRYLATE MATERIAL FLUORINE IMPROVES WETTABILITY AND MAINTAINS O2 PERMEABILITY
MORE FLEXURE AND SURFACE SCRATCHES THAN PMMA
DK 40-100+
MORE DEPOSIT RESISTANT
MANUFACTURING PROCESS OF A BLANK CAN TAKE UP TO 4 TO 6 WEEKS
FIRST STAGE OF THE MANUFACTURING PROCESS
1. POLYMER MIXING PROCESS
2. BATH POLYMERISATION
3. OVEN ANNEALING
SECOND STAGE
QUALITY CONTROL AND FINISHING
Images courtesy of Contamac
WHEN THE MONOMER MIX IS READY
FED INTO ONE OF TWO MOULD TYPES
HERITAGE TRADITIONAL TRAY PROCESS
ROD MOULDS
Images courtesy of Contamac
TRADITIONAL TRAY PROCESS
AFTER SECOND OVEN ANNEALING, MATERIALS MOVE ONTO THE FINISHING STAGE
THE BLANKS PASS THROUGH THE FIRST QUALITY CHECK POINT
IF THEY PASS, THEY MOVE ONTO TRIMMING LINES
PROCESS OVER 30 YEARS OLD
ROD BLANK POLYMER MOLDING
ALTERNATIVE AND NEWER TYPE OF MOULDING PROCESS
BENEFIT IS EFFICIENCY OF REPRODUCIBILITY AFTER POLYMERISATION
RODS ARE CUT INTO THEIR SPECIFICATIONS BY CUSTOM DESIGNED LATHES
Images courtesy of Contamac
THE COMBINED MONOMER MIXING PROCESS AND BATH POLYMERISATION CAN TAKE UP TO 7 DAYS
NEXT, POLYMERISED MATERIAL GOES INTO OVENS FOR ANNEALING
OVEN ANNEALING TAKES UP TO 5 DAYS
OVEN ANNEALING REMOVES ALL RESIDUAL/UNREACTED MONOMERS
ALL BLANKS HAVE TO GO THROUGH A SECOND HEAT PROCESS TO FORGO STRESS
Images courtesy of Contamac
GP MATERIAL CHARACTERISTICS OXYGEN TRANSMISSIBILITY
WETTABILITY
SURFACE PROPERTIES
SCRATCH RESISTANCE
DEPOSIT RESISTANCE
SURFACE TREATMENTS
REFRACTIVE INDEX
STABILITY / RIGIDITY / DURABILITY
MODULUS
COEFFICIENT OF FRICTION / LUBRICITY
UV & OPTICAL TRANSMISSIBILITY
SPECIFIC GRAVITY
KEY PERFORMANCE AREAS
WETTABILITY
STABILITY
OXYGEN PERMEABILITY
WETTABILITY
STABILITY
OXYGEN PERMEABILITY
SURFACE WETTABILITYDETERMINED BY THE WETTING ANGLE OR CONTACT ANGLE
ANGLE FORMED WHEN A DROP OF LIQUID IS PLACED ON THE SURFACE
DEFINES THE ABILITY OF MOISTURE TO SPREAD
AROUND 90° FOR ALL GP BLANKS
No Wetting Poor Wetting Good Wetting Perfect WettingPhoto Credit: Weistron Co., LTD
CONTACT LENS WETTABILITY
WETTABILITY – REFERS TO HOW EASILY A LIQUID SPREADS OVER THE SURFACE OF A CONTACT LENS
CLINICALLY – OBSERVED BY VIEWING THE INTERACTION BETWEEN THE TEARS AND THE LENS SURFACE.
IN THE LAB – IN VITRO WETTABILITY CAN BE QUANTIFIED BY MEASURING THE “CONTACT ANGLE.”
CONTACT ANGLE
ANGLE FORMED BETWEEN A DROP OF LIQUID AND THE SURFACE OF THE LENS
SMALL CONTACT ANGLES
ASSOCIATED WITH AN INCREASED ABILITY OF THE TEARS TO SPREAD OVER THE SURFACE OF A CONTACT LENS1-3
LEAD TO A MORE STABLE TEAR FILM1-3
A CONTACT ANGLE OF 0˚ = A COMPLETELY WETTABLE SURFACE4, 5
1. Lin MC, Svitova TF. Contact lenses wettability in vitro: Effect of surface-active ingredients. Optom Vis Sci 2010;87: 440-7.2. Maldonado-Codina C, Morgan PB. In vitro water wettability of silicone hydrogel contact lenses determined using the sessile drop and captive bubble techniques. J Biomed Mater Res A 2007;83: 496-502.3. Tonge S, Jones L, Goodall S, Tighe B. The ex vivo wettability of soft contact lenses. Curr Eye Res 2001;23: 51-9.4. French K. Contact lens material properties: Part 1 – Wettability. Optician 2005;230: 20-2, 4-6, 8.5. Campbell D, Carnell SM, Eden RJ. Applicability of contact angle techniques used in the analysis of contact lenses, part 1: comparative methodologies. Eye Cont Lens 2013;39: 254-62.
CONTACT ANGLE
PARTIALLY WETTABLE – GREATER THAN 0˚ TO 90˚
PARTIALLY NON-WETTING – BETWEEN 90˚ TO 180˚
COMPLETELY NON-WETTING – GREATER THAN 180˚
French K. Contact lens material properties: Part 1 – Wettability. Optician 2005;230: 20-2, 4-6, 8.
CONTACT ANGLE LAB TECHNIQUES
SESSILE DROP
CAPTIVE BUBBLE (CLMA, ISO)
WILHELMY PLATE
SESSILE DROP
SYRINGE USED TO PUT A DROP OF LIQUID ON THE SURFACE OF A CONTACT LENS.4, 5
THE CONTACT ANGLE IS THE ANGLE CREATED BETWEEN THE SURFACE OF THE CONTACT LENS AND THE DROPLET.
IMAGES OR VIDEOS ARE RECORDED AND ANALYSED WITH COMPUTER SOFTWARE.5
METHOD CAN ALSO MEASURE STATIC AND DYNAMIC CONTACT ANGLES
Examples of a contact lens with (A) A low contact angle ( ) and good wettability(B) A higher contact angle (C) A high contact angle with poor wettability
French K. Contact lens material properties: Part 1 – Wettability. Optician 2005;230: 20-2, 4-6, 8.Campbell D, Carnell SM, Eden RJ. Applicability of contact angle techniques used in the analysis of contact lenses, part 1: comparative methodologies. Eye Cont Lens 2013;39: 254-62.
CAPTIVE BUBBLE
CONTACT LENS IS SUBMERGED IN LIQUID (TYPICALLY WATER)
SYRINGE PLACES A SMALL AIR BUBBLE OR ANOTHER LIQUID WITH A LOWER DENSITY ON THE SURFACE OF THE LENS.4, 5
THE CONTACT ANGLE IS THE ANGLE FORMED BETWEEN THE SURFACE OF THE CONTACT LENS AND THE AIR BUBBLE.
French K. Contact lens material properties: Part 1 – Wettability. Optician 2005;230: 20-2, 4-6, 8.Campbell D, Carnell SM, Eden RJ. Applicability of contact angle techniques used in the analysis of contact lenses, part 1: comparative methodologies. Eye Cont Lens 2013;39: 254-62.Special Edition 2011. Exploring the Science and Technology of Contact Lens Comfort. Contact Lens Spectrum. September 2011.
Dynamic captive bubble technique measuresthe contact angle between an air bubble anda CL surface in an aqueous environment.6
WILHELMY PLATE TECHNIQUE
PROVIDES MORE DATA THAN OTHER METHOD
REQUIRES A LARGE VOLUME OF PROBE LIQUID
DIFFICULT
ACQUIRING AND ANALYSING THE DATA – TIME CONSUMING
RESULTS ARE ACCURATE AND REPRODUCIBLE
Campbell D, Carnell SM, Eden RJ. Applicability of contact angle techniques used in the analysis of contact lenses, part 1: comparative methodologies. Eye Cont Lens 2013;39: 254-62. Uyama Y, Inoue H, Ito K, Kishida A, Ikada Y. Comparison of different methods for contact angle measurement. J Colloid Interface Sci 1991;141: 275-9.
Image http://latexconsultants.blogspot.com/2015/07/study-of-effects-of-surface-tension-in.html
Image credit Contamac
PLASMA TREATMENTFINISHED LENS BOMBARDED WITH HIGH-ENERGY RADIO WAVES IN AN OXYGEN-RICH ENVIRONMENT
GP LENS SURFACE UNDERGOS RADIOFREQUENCY IONIZED OXYGEN THAT MAKE HYDROPHOBIC SURFACES MORE HYDROPHILIC
EXOTIC OXYGEN RADICALS STRIKE THE SURFACE OF THE LENS
DISLODGES HYDROCARBONS SUCH AS OILS
MOLECULES ON THE SURFACE OF THE LENS ARE REARRANGED
CARBON MIGRATES AWAY FROM THE SURFACE
OXYGEN AND NITROGEN MIGRATE TOWARD THE SURFACE
THE LENS SURFACE BECOMES IONIZED, INCREASING ITS ABILITY TO ATTRACT LIQUIDS
PLASMA TREATMENTRESULTS IN
IMPROVED WETTING ANGLE
IMPROVED SURFACE TENSION
FEWER LIPID, PROTEIN AND BACTERIA DEPOSITS
IMPROVES SURFACE WETTABILITY
LESS LENS AWARENESS
IMPROVED COMFORT
REDUCED FOGGING
PLASMA TREATMENT
ALMOST STANDARD OF CARE
EFFECTIVELY REMOVES RESIDUE FROM MANUFACTURING PROCESS
IMPROVES ON-EYE WETTABILITY AND COMFORT
FDA APPROVED FOR ALL MATERIALS
PJ Plasma System
Photo Credit: Bausch & Lomb
PLASMA TREATMENT
HAS BEEN SHOWN TO REDUCE THE WETTING ANGLE TO <20°
CREATES A MORE HYDROPHILIC LENS SURFACE
NOT A LENS COATING
THINK OF IT AS A “SUPER SURFACE CLEANING”
Photo Credit: Dr. Chrysostomou
Wetting angle before and after plasma treatment
TFOS DEWS II REPORT
“MULTIFACTORIAL DISEASE OF THEOCULAR SURFACE CHARACTERIZEDBY A LOSS OF HOMEOSTASIS OFTHE TEAR FILM AND ACCOMPANIEDBY OCULAR SYMPTOMS, IN WHICHTEAR FILM INSTABILITY AND HYPER-OSMOLARITY, OCULAR SURFACEINFLAMMATION AND DAMAGE, ANDNEUROSENSORY ABNORMALITIESPLAY ETIOLOGICAL ROLES.”
DEWS II PREVALENCE
DED PREVALENCE FOR STUDIES INVOLVING SYMPTOMS WITH OR WITHOUT SIGNS 5% TO 50%
UP TO 75% FOR STUDIES BASED PRIMARILY ON SIGNS (HIGHER AND MORE VARIABLE RATES)
REVIEW OF 437 PREVALENCE STUDIES
PREVALENCE OF DED FROM 24 LARGE STUDIES
DRY EYE SYNDROME
PREVALENCE IS MUCH HIGHER AMONG WOMEN
AGING IS A RISK FACTOR
SEX HORMONES ARE KEY FACTORS
CHANGING HORMONE LEVELS / DECREASED ANDROGENS ARE CONTRIBUTORY
MAJOR INDICATIONS FOR SCLERAL LENSES
CORNEAL IRREGULARITY
OCULAR SURFACE DISEASE
IMPROVED COMFORT
PROTECTION OF THE OCULAR SURFACE
REFRACTIVE CORRECTION
SCLERAL LENS INDICATIONS
SEVERE DRY EYES GRAFT VERSUS HOST DISEASESJÖGREN’S SYNDROMESTEVENS JOHNSON SYNDROMENEUROTROPHIC KERATOPATHY
“INCREASING APPRECIATION THAT DAILY WEAR OF A RIGID GAS PERMEABLE SCLERAL LENS MAY PLAY AN IMPORTANT ROLE IN THE MANAGEMENT OF MODERATE TO SEVERE DED.”
THE USE OF SCLERAL LENSES FOR OSD IS MORE WIDELY REPORTED IN A VARIETY OF REVIEWS.
CLINICAL STUDIES REPORT SUCCESS IN THE MANAGEMENT OF DED WITH SCLERAL LENSES, MINI-SCLERAL LENSES AND PROSE DEVICES.
www.sclerallens.org
POOR SURFACE WETTABILITY
DECREASES VISION
DIMINISHES LENS COMFORT
INCREASES CHAIR TIME
INCREASES PATIENT COSTS
Photo Credit: Karen Lee, OD
PATIENTS AT RISK
OCULAR SURFACE DISEASE
OCULAR ROSACEA
MGD
FILAMENTARY KERATITIS
EXCESSIVE LIPIDS IN THE TEAR FILM CREATE A FOGGY, HYDROPHOBIC LENS SURFACE
Photo Credit: James Thimons, OD
PATIENTS AT RISK
EXPOSURE
PTOSIS
STROKE / NERVE PALSY
EYELID REPAIR
EXTERNAL CAUSES
POOR PLUNGER HYGIENE
MAKEUP/SKINCARE REGIME (OIL-BASED PRODUCTS)
HAND SOAPS WITH MOISTURIZING AGENTS
OLDER BLOCKING COMPOUNDS SUCH AS PITCH
TFOS CL DISCOMFORT CLASSIFICATION
ACCORDING TO THE TFOS EXECUTIVE SUMMARY ON CONTACT LENS DISCOMFORT
“CONTACT LENS DISCOMFORT IS A FREQUENTLY EXPERIENCED PROBLEM, WITH MOST ESTIMATES SUGGESTING THAT UP TO HALF OF CONTACT LENS WEARERS EXPERIENCE THIS PROBLEM WITH SOME FREQUENCY OR MAGNITUDE.”1
1. Nichols JJ, Willcox MD, Bron AJ, et al; members of The TFOS International Workshop on Contact Lens Discomfort. The TFOS International Workshop on Contact Lens Discomfort: executive summary. Invest Ophthalmol Vis Sci. 2013 Oct 18;54(11):TFOS7 TFOS13. Figure courtesy of TFOS
PREVENTING AND MANAGING POOR SURFACE WETTABILITY
TREATMENT STRATEGIES
INCREASED LUBRICATION WITH PRESERVATIVE-FREE ARTIFICIAL TEARS OVER THE LENS THROUGHOUT THE DAY
PHYSICAL REMOVAL
REMOVE, MANUALLY CLEAN, RINSE AND REAPPLY
SQUEEGEE TECHNIQUE
POLISH FRONT SURFACE OF LENSES BUT REMOVE PLASMA SURFACE
FIRST AND FOREMOST
TREAT AND MANAGE OCULAR SURFACE DISEASE!
LIPIDS AND MUCINS ARE ATTRACTED TO HYDROPHOBIC GP MATERIAL
PREVENTION THROUGH EDUCATION
WASH HANDS BEFORE HANDLING CONTACT LENSES
ASK PATIENTS ABOUT HAND SOAP
HAND SOAPS
MILD, BASIC HAND SOAPS
CONTACT LENS HANDSOAP
ACNE TREATMENT HAND SOAPS
ASK PATIENTS ABOUT FACE AND EYE CREAMS
PREVENTION THROUGH EDUCATION
DO NOT APPLY OIL-BASED MOISTURIZERS TO THE EYELIDS
DO NOT APPLY ANY MAKEUP TO THE INSIDE AREA OF THE EYELID MARGIN (WATERLINE) OR MEIBOMIAN GLAND ORIFICES
INCREASES RISK FOR MGD AND GLAND OBSTRUCTION OVER TIME
APPLY CREAMS AND MAKEUP AFTER LENS INSERTION
REMOVE CONTACT LENSES, THEN REMOVE MAKEUP
Image O’Dell, Sullivan, PerrimanAOC January 2017
PREVENTION THROUGH PATIENT EDUCATION
USE EYELINER PENCILS – SHARPEN THEM BEFORE EVERY APPLICATION
REPLACE MOIST COSMETICS (MASCARA) MONTHLY
REMOVE MAKEUP DAILY
NEVER USE FACIAL CLEANSERS OR HAND SOAP TO REMOVE EYE MAKEUP
CLEAN EYE MAKEUP BRUSHES REGULARLY
O’Dell, Sullivan, Perriman AOC January 2017
USE PARABEN-FREE POWDER EYE SHADOW THAT HAS A HIGH CLING AND IS NOT EASILY TAPPED OFF THE APPLICATOR OR BRUSH (KNOWN AS FALLOUT)
ALTERNATIVELY, USE A PARABEN-FREE AND RETINOL-FREE SHADOW BASE (PRIMER) OR A PARABEN-FREE CREAM-BASED EYE SHADOW TO PREVENT FALLOUT INTO THE TEAR FILM
USE PARABEN-FREE AND FORMALDEHYDE-FREE EYELINER PENCILS
AVOID THE EYELASH ROOTS AND LID MARGINS – MAY CAUSE SUPERFICIAL OBSTRUCTION OF THE GLANDS
O’Dell, Sullivan, Perriman AOC January 2017
SOLUTIONS
CHANGE TO PEROXIDE BASED SOLUTIONS
CONSIDER ENZYMATIC CLEANER / MENICON PROGENT
IF DEPOSIT-PRONE, ALTERNATE A DAILY GP LENS CLEANER WITH AN EXTRA STRENGTH OR AN ALCOHOL-BASED DAILY CLEANER
APPLICATION SOLUTIONS
Polymer encapsulates lens
Improves wettability
Increases surface water retention
Increases lubricity
Reduces deposits
PROTEIN AND LIPID DEPOSITION
SCLERAL LENS FOGGING AND COMFORT STUDYDR. MARIA WALKER-PRINCIPAL INVESTIGATOR
18 SUBJECTS
26 – 72 YEARS OLD
ALL HABITUAL SCLERAL LENS WEARERS
FOGGING IS DRAMATICALLY IMPROVED
HYDRA-PEG IMPROVES END OF DAY COMFORT
PATIENTS PREFER HYDRA-PEG LENSES
PARTNER LAB - END OF DAY COMFORT STUDY
Falco Linsen, Switzerland
n = 34 eyes n = 11 eyes
PARTNER LAB – WEAR TIME AND PREFERENCE
Hetych Kontaktlinsen, Austria
WHICH WOULD YOU CHOOSE FOR YOUR PATIENT?
TANGIBLE HYDRA-PEG: PATIENT EDUCATION
EDUCATE PATIENTS THAT THE TANGIBLE HYDRA-PEG SURFACE WILL RESULT IN A MORE “SLIPPERY” LENS
MAY REQUIRE A BRIEF ADJUSTMENT PERIOD FOR HANDLING, INSERTING AND REMOVING THE LENS
TANGIBLE HYDRA-PEG: PATIENT SELECTIONMAY BE USED BY ANY PATIENT
NO CONTRAINDICATIONS
NO NEED FOR FIT CHANGES
PATIENTS WHO MAY BENEFIT THE MOST:THOSE EXPERIENCING DRYNESS OR DISCOMFORT ASSOCIATED WITH LENS WEAR
MODERATE TO HEAVY DEPOSITORS
SCLERAL LENS WEARERS EXPERIENCING FOGGING
COMPATIBLE SOLUTIONS WITH TANGIBLE HYDRA-PEGMULTIPURPOSE SOLUTIONS
MENICON UNIQUE PH
BOSTON SIMPLUS®
HYDROGEN PEROXIDE SOLUTIONSCLEAR CARE®
CLEAR CARE® PLUS WITH HYDRAGLYDE®
INCOMPATIBLE SOLUTIONSTAP WATER, ABRASIVE OR ALCOHOL-BASED CLEANERS
ABRASIVE CLEANERS
BOSTON® ADVANCE
ALCOHOL BASED CLEANERS
MIRAFLOW
OTHERS
MENICON PROGENT
BOSTON ONE STEP LIQUID ENZYMATIC CLEANER
OPTIMUM BY LOBOB ESC EXTRA STRENGTH CLEANER
TANGIBLE HYDRA-PEG BY THE NUMBERSWITH PROPER CARE, COATING LASTS 12-18 MONTHS
HYDRA-PEG WAS LAUNCHED IN JANUARY 201740,000 PATIENTS TREATED IN 2017HYDRA-PEG COATED LENSES AVAILABLE FROM 18 GLOBAL MANUFACTURERSPRICE IS MINIMAL COMPARED TO PRICE OF LENS
A d v a n c e d V i s i o nA d v a n c e d V i s i o nT e c h n o l o g i e sT e c h n o l o g i e sT e c h n o l o g i e s
®
BEFORE HYDRA-PEG
Images Tom Arnold, OD
WITH HYDRA-PEG
Image Tom Arnold, OD
HOW TO CREATE A SLICK SURFACE
TREAT AND MANAGE OCULAR SURFACE DISEASE
REVIEW SOLUTIONS
PATIENT EDUCATION
HAND SOAP
LOTIONS
MAKEUP
UTILIZE PLASMA AND TANGIBLE HYDRA-PEG