Markings are shown at every 5 Degrees, with 4 slots at 0, 90, 180 and 270 Degrees. Slots at 0 and 180 are at the inner ring, and slots are at 90 and 270 for the outer ring. The surgeon can insert a marking pen tip in the slot for marking.
Overall length: 93mm
Outer diameter: 76mm
Inner diameter: 3.7mm
45 Degrees angle
Designed for hyperopic LASIK procedures to reduce regression, posterior curvature is designed to match the hyperopic ablation zone. Visibility during application is increased by the central opening. Applied to cornea for 15 seconds after LASIK. Increases the diameter of the steeper area.