title: Influence of patient age on photorefractive keratectomy for myopia.
abstract: BACKGROUND
  To determine whether the outcomes of photorefractive keratectomy (PRK) for myopia are age-dependent.
  
  
  METHODS
  The influence of age on PRK outcomes was analyzed for one eye of each of 72 patients divided into two groups: 39 patients (18 to 26 years) and 33 patients (35 to 54 years). The influence of the amount of preoperative myopia (low myopia less than -4.00 diopters (D); moderate to high myopia -4.00 or more D) was also evaluated. All patients were followed for at least 1 year, and all underwent cycloplegic refractions.
  
  
  RESULTS
  One year after PRK, the average refraction was -0.15 D in the younger group and +0.38 D in the older group. The achieved refraction was higher than the attempted by +1.00 D or more only in eyes with moderate to high myopia (-4.00 to -10.00 D); 11.54% (3 eyes) of the younger group and in 34.78% (8 eyes) of the older group.
  
  
  CONCLUSIONS
  After PRK for myopia, patients between the ages of 35 and 54, with moderate to high myopia, obtained more refractive change with the same intended dioptric correction compared to younger patients with moderate to high myopia. Attempted correction should be adjusted according to age and amount of myopia.
authors.affiliation: Department of Ophthalmology, Ichilov Hospital, Tel-Aviv, Israel.
authors.forename: A
authors.initials: A
authors.lastname: Loewenstein
authors.forename: I
authors.initials: I
authors.lastname: Lipshitz
authors.forename: D
authors.initials: D
authors.lastname: Levanon
authors.forename: A
authors.initials: A
authors.lastname: Ben-Sirah
authors.forename: M
authors.initials: M
authors.lastname: Lazar
mesh_terms: D000065:Accommodation, Ocular / Q000502:physiology; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D003315:Cornea / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D054018:Lasers, Excimer; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000503:physiopathology / Q000601:surgery*; D018903:Photorefractive Keratectomy; D012189:Retrospective Studies; D016896:Treatment Outcome; D014792:Visual Acuity