title: Centration of excimer laser photorefractive keratectomy and changes in astigmatism.
abstract: One of the most important factors that influence the success of PRK might be corneal centration during treatment. We evaluated our centration rate in 49 eyes by using computer-assisted corneal topography. Only single zone treated eyes were chosen for the analysis and 91.5% of the eyes were centered within a 1 mm treatment zone while 51% were within 0.5 mm. At the end of the follow-up time of 10.4 months, these centration zones were found to have no influence on the attempted spherical refractive outcome, whereas increasing decentration induced an increase in postoperative astigmatism.
authors.affiliation: University of Istanbul, Cerrahpasa Turkey.
authors.forename: R
authors.initials: R
authors.lastname: Aktunç
authors.forename: T
authors.initials: T
authors.lastname: Aktunç
mesh_terms: D000328:Adult; D001251:Astigmatism / Q000209:etiology / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation; D054018:Lasers, Excimer; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000601:surgery*; D019721:Ophthalmoscopes; D018903:Photorefractive Keratectomy / Q000295:instrumentation*; D011183:Postoperative Complications / Q000209:etiology*; D012029:Refraction, Ocular; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology