title: Laser in situ keratomileusis for undercorrection after radial keratotomy.
abstract: OBJECTIVE
  To assess the safety and efficacy of excimer laser in situ keratomileusis (LASIK) in treating residual myopia and/or astigmatism following refractive keratotomy.
  
  
  METHODS
  Fourteen eyes that had previously undergone radial and/or arcuate keratotomy were included. The surgeries were performed using the Chiron Automated Microkeratome and the VISX 20/20B excimer laser.
  
  
  RESULTS
  Average follow-up was 12.64+/-5.02 months. Mean spherical equivalent refraction was reduced from -3.48+/-3.52 D preoperatively to -0.04+/-0.87 D postoperatively. At the last follow-up examination there were 8 eyes (57.1%) with a refraction within+/-0.50 D, and 10 eyes (71.4%) within +/-1.00 D of emmetropia. Uncorrected visual acuity was 20/20 or better in 4 eyes (28.6%) and 20/40 or better in 10 eyes (71.4%). Vector analysis of the astigmatic correction showed an index of success of 80%. There was no significant loss (> or = or =2 lines) of spectacle-corrected visual acuity. We observed interface epithelial ingrowth in one eye.
  
  
  CONCLUSIONS
  The correction of residual myopia and/or astigmatism with LASIK in eyes with prior refractive keratotomy proved to be safe and effective. Careful preoperative evaluation may help to avoid complications such as reopening of incisions during surgery or postoperative ingrowth of epithelium beneath the corneal flap.
authors.affiliation: Eye Clinic Day Hospital, São Paulo, Brazil.
authors.forename: A S
authors.initials: AS
authors.lastname: Forseto
authors.forename: R A
authors.initials: RA
authors.lastname: Nosé
authors.forename: C M
authors.initials: CM
authors.lastname: Francesconi
authors.forename: W
authors.initials: W
authors.lastname: Nosé
mesh_terms: D000328:Adult; D001251:Astigmatism / Q000209:etiology / Q000601:surgery*; D003315:Cornea / Q000473:pathology / Q000601:surgery*; D016039:Corneal Transplantation / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007646:Keratotomy, Radial; D053685:Laser Therapy; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000209:etiology / Q000601:surgery*; D011446:Prospective Studies; D012086:Reoperation; D014792:Visual Acuity