title: [PRK and LASIK in patients with myopia ranging from -6 to -9 D] ].
abstract: OBJECTIVE
  Observing of effectiveness, safety and short-term stability of patients with myopia ranging from -6.0 to -9.0 diopters (D) after surgery and their comparison.
  
  
  METHODS
  We were retrospectively analyzing pre- and postoperative outcomes of patients with myopia ranging from -6.0 to -9.0 D. 90 eyes were examined before laser in situ keratomileusis (LASIK) with mean spherical equivalent refraction -7.64 +/- 0.84 D and mean cylinder -1.23 +/- 1.1 D. 56 eyes were examined before photorefractive keratectomy (PRK) with mean spherical equivalent refraction -6.92 +/- 0.72 D and mean cylinder -0.60 +/- 0.55 D. Patients were examined before operation, one week, one month, three months, six months, nine months and one year after operation. Data were collected and analyzed by the computer programme.
  
  
  RESULTS
  We observed the patients who underwent the operation and six months after surgery we received following results: After PRK mean spherical equivalent refraction was -0.23 +/- 1.24 D, mean cylinder -0.83 +/- 0.42 D, uncorrected visual acuity (UCVA) 0.86 +/- 0.35, best spectacle-corrected visual acuity (BCVA) 1.13 +/- 0.33. After LASIK mean spherical equivalent refraction was -0.29 +/- 1.19 D, mean cylinder -1.14 +/- 0.77 D, UCVA 0.65 +/- 0.25, BCVA 0.83 +/- 0.25. One year after PRK mean spherical equivalent refraction was -0.44 +/- 1.26 D, mean cylinder -0.80 +/- 0.57 D, UCVA 0.81 +/- 0.31, BCVA 0.97 +/- 0.21. After LASIK mean spherical equivalent refraction was -0.14 +/- 0.86 D, mean cylinder -1.26 +/- 0.89 D, UCVA 0.75 +/- 0.25, BCVA 0.89 +/- 0.20.
  
  
  CONCLUSIONS
  Both methods are effective and their results after 3 to 6 months after laser treatment in patients with myopia ranging from -6.0 to -9.0 D were comparable. Based on the complex evaluation, we prefer LASIK nowadays.
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: J
authors.initials: J
authors.lastname: Kvasnicka
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D020731:Keratomileusis, Laser In Situ; D054018:Lasers, Excimer; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000175:diagnosis / Q000601:surgery*; D018903:Photorefractive Keratectomy; D012029:Refraction, Ocular; D012189:Retrospective Studies; D014792:Visual Acuity