مقايسه دو روش كراتكتومي فوتورفركتيو با حفظ بافت و انفرادي شده از نظر ميزان اعوجاج بعد از عمل

Comparison of Aberrations after Photorefractive Keratectomy Using Tissue Saving and Personalized Techniques

Purpose: To compare the effects of standard tissue saving method and personalized techniques of photorefractive keratectomy (PRK) on aberration changes in fellow eyes. Methods: This randomized controlled trial was performed on patients who were referred to Isfahan Parsian Clinic during 2007. After a comprehensive ophthalmologic examination, PRK was randomly performed using tissue saving (TS) technique in one eye and personalized (P) technique in the fellow eye. Aberrometry was performed pre- and 6 months postoperatively. Results: This study included 296 eyes of 148 (67 male and 81 female) patients with mean age of 29.1±7.0 years. The two groups had no significant difference in terms of laterality, pupil size and level of myopia preoperatively (P=0.65). Uncorrected visual acuity was 20/25 or more in 88.9% of the TS group and 92.6% of the P group (P=0.83). Mean refractive error 6 months postoperatively was -0.50±0.36 diopter (0) in the TS group and 0.31±0.43 0 in the P group (P=0.95). Mean root-mean-square (RMS) value was -0.41±0.17 preoperatively and 0.86±0.43 postoperatively in the group TS (P