Indications
• When a standard soft or RGP lens design will not fit eyes in which the central corneal curvature is flatter than the para-central corneal curve.
• Condition may be due to a surgical graft, RK, PRK, LASIK or other reasons.

Description
The posterior surface of the lens consists of a flat central curve, steeper para-central curve, and a final peripheral curve. All curves are aspheric and available in a wide rage of radii and zone diameters. The para-central curve is similar in design to the base curve of a standard soft lens and the 8.6 mm. radius curve with a 14.5 mm. diameter should fit the majority of eyes unless corneal topography or pre-surgical K readings indicate that the para-central cornea is steeper or flatter than normal.

The anterior surface has an aspheric central optical portion to correct for spherical aberration and a thinner flange curve to maximize oxygen to the cornea. When residual astigmatism indicates that a toric lens is needed, double slab-off ballasting may be used to stabilize lens rotation.

The vial label will show the standard parameters as well as central/para-central curves.