PHOTOREFRACTIVE KERATECTOMY FOR RESIDUAL MYOPIA AFTER PREVIOUS REFRACTIVE KERATOTOMY

Photorefractive keratectomy (PRK) was performed on 91 eyes of 71 patie nts who had previous radial keratotomy, radial combined with astigmati c keratotomy or astigmatic keratotomy alone (refractive keratotomy). R esidual myopia, prior to photorefractive keratectomy, ranged from -1.5 0 to -8.00 D (mean -3.62) and cylinder from 0 to 2.25 D (mean 0.78). U ncorrected visual acuity was 20/40 or better in 89.7% at one year. At the 12 month follow-up 75.9% of patients were within +/- 1.00 D of int ended correction.