title: [Refractive surgery in myopia up to -6D].
abstract: OBJECTIVE
  To evaluate the clinical results in patients with myopia up to -6 dioptres (D) after refraction surgery, evaluate their stability and compare photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK).
  
  
  METHODS
  The authors evaluated before and after surgery the refraction values in patients with myopia up to -6 D operated in 1999 and 2000. The patients were subjected to standard examination before operation, one week, 1, 3, 6 and 12 months after operation. The group comprised a total of 542 eyes, 452 PRK eyes and 90 LASIK eyes.
  
  
  RESULTS
  After PRK surgery the mean spherical refraction after one year was -0.35 +/- 0.71 D, the mean astigmatism -0.63 +/- 0.38 D, UCVA 0.90 +/- 0.19, BCVA 0.98 +/- 0.11. After LASIK surgery after one year the mean spherical refraction was -0.10 +/- 0.81. D, the mean astigmatism -1.05 +/- 0.65 D, UCVA 0.80 +/- 0.24, BCVA 0.86 +/- 0.21.
  
  
  CONCLUSIONS
  Both methods proved effective and safe for correction of myopia up to -6 D. The results at our clinic are comparable with other departments and are stable in different years. PRK and LASIK achieve equal postoperative results after an interval of 3 to 6 months following surgery.
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: D001251:Astigmatism / Q000175:diagnosis; D005500:Follow-Up Studies; D006801:Humans; D020731:Keratomileusis, Laser In Situ; D054018:Lasers, Excimer; D009216:Myopia / Q000503:physiopathology / Q000601:surgery*; D018903:Photorefractive Keratectomy; D012029:Refraction, Ocular; D012189:Retrospective Studies