title: [Long-term results of photorefractive keratectomy in myopia up to -6 D].
abstract: OBJECTIVE
  To present clinical results of patients with myopia up to -6 dioptres (D) after photorefractive keratectomy (PRK) and evaluate their stability during a 4-year period.
  
  
  METHODS
  The authors evaluated retrospectively the refraction before and after surgery in patients with myopia up to -6 D during the period from September 1997 till December 2000. The group comprised a total of 847 eyes. The mean spherical refraction during the whole follow up period was before surgery -3.61 +/- 1.17 D, the mean astigmatism was -0.65 +/- 0.63 D, non-corrected visual acuity (UCVA) 0.09 +/- 0.09, the visual acuity with optimal correction (BCVA) 1.21 +/- 0.30.
  
  
  RESULTS
  One year after PRK we achieved in our group a mean spherical refraction of -0.17 +/- 0.74 D, a mean astigmatism of -0.61 +/- 0.43 D, UCVA 0.92 +/- 0.25, BCVA 1.02 +/- 0.19.
  
  
  CONCLUSIONS
  Photorefractive keratectomy is an effective and safe method for correction of myopia up to -6 D. The results as regards refraction were comparable with other departments and did not differ much during individual years. Stabilization occurs 3-6 months after the operation.
authors.affiliation: Ocní klinika Fakultní nemocnice, Hradec Králové.
authors.forename: V
authors.initials: V
authors.lastname: Lorencová
authors.forename: P
authors.initials: P
authors.lastname: Rozsíval
authors.forename: A
authors.initials: A
authors.lastname: Feuermannová
authors.forename: I
authors.initials: I
authors.lastname: Havlíková
authors.forename: J
authors.initials: J
authors.lastname: Urminský
mesh_terms: D005500:Follow-Up Studies; D006801:Humans; D054018:Lasers, Excimer; D009216:Myopia / Q000503:physiopathology / Q000601:surgery*; D018903:Photorefractive Keratectomy; D012029:Refraction, Ocular; D012189:Retrospective Studies; D014792:Visual Acuity