Clinical performance of a spline-based apical vaulting keratoconus corneal contact lens design.

We refit 68 eyes with keratoconus and recurring contact lens induced apical corneal erosions with rigid corneal contact lenses having computer-generated spline curves. This junctionless design incorporates two independently configurable fitting zones on the back surface of the lenses that enable them to fit most keratoconus eyes with an apical vault rather than the traditional two or three point touch. Apical staining was eliminated in 49 eyes (72%), significantly reduced in 13 eyes (19%), and remained unchanged in six eyes (9%). Corneal abrasion related symptoms of contact lens wear intolerance resolved in 41 of 43 eyes.