Articles: PDF OnlyPhotorefractive keratectomy to treat myopia and astigmatism after radial keratotomy and penetrating keratoplastyNordan, Lee T. M.D.; Binder, Perry S. M.D.; Kassar, Barry S. M.D.; Heitzmann, Joy Ph.D.*Author Information From the Mericos Eye Institute of Scripps Memorial Hospital, La Jolla, California *Reprint requests to Joy Heitzmann, Ph.D., Mericos Eye Institute, P.O. Box 28, La Jolla, California 92038-0028. The authors are clinical investigators under the United States Food and Drug Administration Phase III clinical trials for the VISX excimer laser. Journal of Cataract & Refractive Surgery: May 1995 - Volume 21 - Issue 3 - p 268-273 doi: 10.1016/S0886-3350(13)80130-7 Free Metrics Abstract Fifteen eyes with an initial myopia between −5.00 diopters (D) and −12.00 D were treated with radial keratotomy (RK) followed by photorefractive keratectomy (PRK) at least 6 months later and observed for 6 months to 24 months. Five eyes that had penetrating keratoplasty (PKP) were treated for residual ametropia by PRK and followed for up to two years. For the RK-treated eyes, mean pre-PRK refraction was −4.00 D sphere and +1.25 D cylinder, which improved to −0.52 D sphere and +0.73 D cylinder. Incidence of complications, including corneal haze, was extremely low in both the RK and PKP groups. In summary, PRK is a valuable method for correcting ametropia following RK and PKP, with risks similar to that for eyes having PRK as the initial refractive procedure. © Williams & Wilkins 1995. All Rights Reserved.