title: [Excimer laser photorefractive keratectomy for lower to moderate myopia: 5 year follow-up].
abstract: OBJECTIVE
  To evaluate the long-term effectiveness and safety of photorefractive keratectomy (PRK) for patient with lower to moderate myopia.
  
  
  METHODS
  148 myopic eyes (-1.5 to -6.00 D) after PRK follow-up of more than 5 years were analyzed.
  
  
  RESULTS
  Uncorrected visual acuity was >or= 1.0 in 136 eyes (91.9%), >or= 0.8 in 4 eyes (2.7%) and >or= 0.6 in 8 eyes (5.4%). The mean spherical equivalent change was from (-4.43 +/- 0.97) D to (-0.12 +/- 0.22) D, and the keratometric power (K value) was reduced from (43.81 +/- 1.10) D to (41.36 +/- 1.30) D in the 5 years of follow-up (P < 0.01).
  
  
  CONCLUSIONS
  The long-term effectiveness of PRK for myopia (-1.5 to -6.00 D) is satisfactory.
authors.affiliation: Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100730.
authors.forename: S
authors.initials: S
authors.lastname: Zhan
authors.forename: G
authors.initials: G
authors.lastname: Pang
authors.forename: Y
authors.initials: Y
authors.lastname: Jin
authors.forename: Y
authors.initials: Y
authors.lastname: Sun
authors.forename: W
authors.initials: W
authors.lastname: Li
mesh_terms: D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D054018:Lasers, Excimer; D008297:Male; D009216:Myopia / Q000601:surgery*; D018903:Photorefractive Keratectomy; D016896:Treatment Outcome