title: Photorefractive keratectomy to treat myopia and astigmatism after radial keratotomy and penetrating keratoplasty.
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.
authors.affiliation: Mericos Eye Institute, Scripps Memorial Hospital, La Jolla, California 92038-0028, USA.
authors.forename: L T
authors.initials: LT
authors.lastname: Nordan
authors.forename: P S
authors.initials: PS
authors.lastname: Binder
authors.forename: B S
authors.initials: BS
authors.lastname: Kassar
authors.forename: J
authors.initials: J
authors.lastname: Heitzmann
mesh_terms: D000328:Adult; D000368:Aged; D001251:Astigmatism / Q000209:etiology / Q000601:surgery*; D003315:Cornea / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015948:Keratoplasty, Penetrating / Q000009:adverse effects*; D007646:Keratotomy, Radial / Q000009:adverse effects*; D053685:Laser Therapy; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000209:etiology / Q000601:surgery*; D011379:Prognosis; D014792:Visual Acuity; D014945:Wound Healing