• Aspheric Design
• 3 Point Touch Fit
The 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.
Flatten the Base Curve by ½ diopter |
Steepen the Base Curve by ½ diopter |
CK’s: R: 48.00/52.00
L: 49.50/53.00
|
Refraction: -6.00
Refraction: -7.00
|
Eccentricity Value = .72
Eccentricity Value = .79 |
R: Base Curve: 6.37
L: Base Curve: 6.19 |
Lens Power: -10.62 (w/vertex)
Lens Power: -11.50 (w/vertex) |
|