Fits All Types of Keratoconus
• Aspheric Design
• 3 Point Touch Fit
The Contex AS-20H™ lens utilizes a high eccentricity value. This allows us to fit a steep base curve so the lens will rest lightly on the cone but it also gives us a light touch in the periphery to balance the pressures. The first lens should be fit about five diopters steeper than flat K.
1. Light touch on cone.
2. The lens should center between the apex of the cornea and the cone.
3. Peripheral clearance is a must to promote tear exchange to the cone.
4. The lens must display adequate movement on the blink.
5. The best starting overall diameters are 10.0 - 10.2mm.
6. Trial fitting is a must for best success.
If Indicated Lens is Too Tight:
Flatten the Base Curve by ½ diopter
If Indicated Lens is Too Loose:
Steepen the Base Curve by ½ diopter
Download the AS-20H™ Fitting and Information Sheet. Download PDF
Or please contact one of our knowledgeable consultants. How to Order