Hexagonal Keratotomy Reduces Hyperopia After Radial Keratotomy in Rabbits

Abstract
Overcorrection and progressive hyperopia are known complications of radial keratotomy. In an attempt to develop a surgical correction for this complication, a relative hyperopia was induced in New Zealand white rabbits by radial keratotomy. Six to eight weeks after surgery, hexagonal keratotomy was performed. Two months after hexagonal keratotomy, refraction indicated an average reduction in the surgically induced hyperopia of 2.74 diopters. This study indicates that hyperopia induced by radial keratotomy can be corrected by hexagonal keratotomy