Abstract

Surgical modification of the cornea for the correction of ametropia has received increasing attention, particularly with the introduction of radial keratotomy and, more recently, excimer-laser photorefractive keratectomy. The goal is to produce an optical zone that is centered on the pupil and within which the corneal curvature is modified to a constant, predetermined value. There are medical reasons for making the optical zone relatively small.

© 1990 Optical Society of America