title: Excimer laser photorefractive keratectomy for myopia: six-month follow-up.
abstract: In this study, 108 eyes of 62 patients had photorefractive keratectomy (PRK) with a 193 nm excimer laser to correct myopia. The eyes were assigned to one of three groups: low, moderate, or high myopia. Six months after PRK, 88.9% of eyes in the low myopia group, 90.0% in the moderate myopia group, and 23.8% in the high myopia group achieved an uncorrected visual acuity of 20/40 or better. In the low myopia group, 88.9% were within +/- 1 diopter (D) of attempted correction, as were 70.0% in the moderate group and 18.8% in the high myopia group. There were no significant complications. We conclude that excimer laser PRK appears to be a safe and relatively accurate procedure to correct low to moderate myopia but not high myopia because of regression over time.
authors.affiliation: I-Centre, Kowloon, Hong Kong.
authors.forename: P P
authors.initials: PP
authors.lastname: Tong
authors.forename: J T
authors.initials: JT
authors.lastname: Kam
authors.forename: R H
authors.initials: RH
authors.lastname: Lam
authors.forename: W K
authors.initials: WK
authors.lastname: Leung
authors.forename: V C
authors.initials: VC
authors.lastname: Woo
authors.forename: P C
authors.initials: PC
authors.lastname: Chow
authors.forename: S O
authors.initials: SO
authors.lastname: Hung
authors.forename: W F
authors.initials: WF
authors.lastname: Wong
authors.forename: T W
authors.initials: TW
authors.lastname: Wong
mesh_terms: D000328:Adult; D003315:Cornea / Q000502:physiology / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D053685:Laser Therapy; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000145:classification / Q000503:physiopathology / Q000601:surgery*; D011183:Postoperative Complications; D012029:Refraction, Ocular; D014792:Visual Acuity / Q000502:physiology