EyePal Cone
Selection of Cone Design
When looking at the Topography Map, the EyePal Cone works best with the cones located in the central part of the cornea & helps to eliminate halos/flaring of lights due to the unique optic zone and comfort is increased with the Variable Inverse Periphery Technology. If the cone is centered in the lower part of the cornea or is pellucid, the Naturalens 10.8 Diameter lens may be the best design for this.
Peripheral Fit
Trial lenses have a standard edge lift, but a flatter or steeper edge lift can be ordered. The proper edge lift will show at least .5mm of fluoroscein in the periphery of the lens. If the base curve looks good but the periphery looks tight or is biting down, order a flatter edge lift. If the periphery has excess edge lift of a bubble on the edge, order a steeper edge lift.
Selection of the Base Curve
The initial selection of the base curve is simple. Take the average of the Sim K Readings. For example: The Flat K Reading is 46:00 and the Steep K Reading is 50:00, the average K reading would be 48:00. Select the 703(48:00) Base Curve as your first trial lens. A well fitting lens should have minimal apical clearance . The three Point Touch pattern is acceptable.