Keratoconus Eng

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Contact Lenses forKeratoconus

Moodi

Kupperman B.Sc

SOFLEX


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Keratoconus

is a non-inflammatory eyecondition in which the normallyround dome-shaped corneaprogressively thins causing acone-like bulge to develop

keratoconus causes blurring

and distortion of vision


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Corneal Topography

Is a non invasive medical imagingtechnique for color mapping the surfacecurvature of the cornea

This instrument has become for the last

years a part of the checking room Computerized Corneal Modeling System

(CMS) is used to evaluate (type and size)corneal shapes


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The most commonKeratoconus types

NIPPLE CONEAdvanced keratoconus, K readings 5.20 to 6.40mm


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The most commonKeratoconus types

OVAL CONE

The most common, K readings 5.80 to 7.20mm


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Other types of Keratoconus

KERATOGLOBUS

Wide area at the center of the cornea

blow off the shape of the cornea

K readings 6.60 to 7.80mm


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Pellucid Marginal Degeneration

Is a rare condition where the lower part of thecornea becomes thinner and irregular.

The shape of the topographyis like

two birds kissing !!!


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Post Lasik Ectasia

Keratoconus that is caused by the change inthe thickness of the cornea


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The main problems caused bykeratoconus

Vision lossthe cornea gradually thins andbecomes misshaped. The corneasurface becomes irregular similar

to the shape of a cone from theI.O.P .

Opaque cornea

An advanced stage of the keratokonus,

where the cornea cracks andbecomes opaque, in this stage theonly solution is a corneal transplant


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What to do ??The most common ways

Fitting Contact Lenses Specially designed RGP lenses

Soft contact lenses designed specificallyfor Keratoconus

Piggy back - soft contact lenses to "carry"a gas permeable lens

Soft lens with a hard center Scleral contact lenses

Intact rings implantation Corneal Implant


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Treatment with contact lenses

The main goal Good vision

S fl i l l f


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Soflex special lenses for

KeratoconusRGP Lenses

- Naturalens

Multi curves with special landing shapeFor early keratoconus

- OP8

High aspheric (ecc=0.8)

Especially designed for the most common types

- Piggy-Back LensesHi DK GP lens on top

of a thin soft lens

All lenses are manufactured from Hi DK materials

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Keratoconus)(contRGP Lenses

- Asymmetric

Especially designed for PMD

- McGuire lens systemMulti curves (5)3 sets designed for nipple, oval and forglobus cones


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Keratoconus

Soft LensesSOFT K. & SOFT K. Toric

for Keratokonus and

irregular corneas


Front Toric can be added

to part of the lenses, RGP and Soft !!!


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The target in fitting contact lenses

for Keratoconus

Excellent vision day and night, noglare (pin hole)

Hi level of comfort for many hours

High oxygen material for cornealhealth

Easy to fit and adapt Available to all


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Fitting guide forkeratoconus contact lenses

Case history

Total check up with slit lamp

Evaluate tear quality and quantity Refraction and free vision quality

Topography check of the cornea


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Fitting guide forkeratoconus contact lenses (cont) Selecting the first choice Trial Lens

Evaluate fitting with slit lamp usingfluorescien for GP lenses

Changing the lens if needed

Over refraction

Ordering the lens


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Fluorescien pattern

The most common is the

THREE POINT TOUCH Avoid having air bubbles


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Fitting Tips For Soft K.

Try to use the Soft K. for all types ofdistorted cornea.

First check with Trial Lens after 30minutes and change if necessary

Final check for fitting and over refraction

after at least 2 hours. Cleaning !! Using daily cleaner & H2O2

systems

Special !!


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Follow up and lens care

Call the patient for regular checkups

Give the patient solutions for taking careof his lenses

Demonstrate and give written instructionofhow to take care his lenses

Instruct your patient to call you

immediately when he feels any change in: Visual acuity

Comfort

Any health change in his eyes


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THANK YOU

VERY MUCH !!

QUESTIONS PLEASE

http://www.opt.pacificu.edu/ce/catalog/15167-AS/Keratoconus.html

Documents

Keratoconus Eng