Photorefractive keratectomy after radial keratotomy

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Abstract
D previous RK surgery. The mean interval between the RK and PRK was 1.5 years. Mean follow-up was seven months. Mean preoperative refraction was −4.08 ± 1.35 diopters (D) and after PRK was +1.61 ± 1.18 D at three months, +1.05 ± 0.75 D at six months, and +0.79 ± 0.83 D at 12 months. An uncorrected visual acuity of 20/40 or better was achieved in eight eyes at three months, seven eyes at six months, and three eyes at 12 months. One eye had a transient loss of two Snellen lines of best spectacle corrected visual acuity because of increased haze. No other significant complication was noted. Our study shows that PRK is a predictable, effective, stable, and safe technique to correct residual myopia after RK. The results were similar to those of PRK without prior surgery, although we noted a slightly greater hyperopic deviation. We believe that eyes undercorrected by RK may benefit from subsequent PRK. aReprint requests to Miguel A. Zato, M.D., Department of Ophthalmology, Fundacion Jimenez-Diaz, Avenida Reyes Catolicos 2, 28040-Madrid, Spain. © Williams & Wilkins 1994. All Rights Reserved....