title: [Analysis on three-year follow-up results of excimer laser photorefractive keratectomy in treatment for myopia and myopic astigmatism].
abstract: OBJECTIVE
  To evaluate the efficacy of excimer laser photorefractive keratectomy(PRK) on myopia and myopia astigmatism.
  
  
  METHODS
  PRK was performed with VISXC20/20 on 377 eyes of 209 patients. Treated eyes were divided into two groups, according to their conditions before operation: Group I included 238 eyes (-1.50 to -6.00 D); Group II, 139 eyes (-6.25 to -16.00 D). All patients were followed-up for more than three years.
  
  
  RESULTS
  Percentages of uncorrected visual acuity (UCVA) > or = 10/20 and 20/20 were 99.6% and 85.3% in Group I, and 79.9% and 48.2% in Group II respectively. Percentage of diopter < +/- 1.00 in Group I was 94.5%, and 61.9% in Group II. The rate of corneal haze of grade 0 was 100% in Group I, and 98.6% in Group II, but corneal haze of grade 2 was found in 1.2% of eyes in Group II. The postoperative intraocular pressure (IOP) of all operated eyes was normal.
  
  
  CONCLUSIONS
  The results suggest that excimer laser PRK is an effective method for treating myopia and myopic astigmatism, especially for low and moderate myopia.
authors.affiliation: Ophthalmic Laser Center, Xiangya Hospital, Central South University, Changsha 410008, China.
authors.forename: S Z
authors.initials: SZ
authors.lastname: Liu
authors.forename: X Y
authors.initials: XY
authors.lastname: Wu
authors.forename: P B
authors.initials: PB
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D001251:Astigmatism / Q000150:complications / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D054018:Lasers, Excimer; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000150:complications / Q000601:surgery*; D018903:Photorefractive Keratectomy; D014792:Visual Acuity