Topography‐guided transepithelial photorefractive keratectomy to correct irregular refractive errors after radial keratotomy. Issue 3 (March 2018)

• Record Type: Journal Article
• Authors: Ghoreishi, Mohammad; Peyman, Alireza; Koosha, Nima; Golabchi, Khodayar; Pourazizi, Mohsen
• Is Part Of: Journal of cataract and refractive surgery. Volume 44:Issue 3(2018)
• Publication Date: 2018-03
• Subjects: 617.7
• DOI: 10.1016/j.jcrs.2017.12.015
• Languages: English
• ISSNs: 0886-3350

Abstract

Abstract : Purpose: : To evaluate the efficacy and safety of topography‐guided transepithelial photorefractive keratectomy (PRK) in a group of patients with post‐radial keratotomy (RK) showing irregular corneas. Setting: : Feiz University Hospital, Isfahan, Iran. Design: : Prospective case series. Methods: : Consecutive patients who had irregular astigmatism after RK with stable refraction and topography for at least 1 year were recruited. All eyes had excimer laser topography‐guided single‐step transepithelial PRK. The efficacy, safety, predictability, and corneal wavefront aberration changes were assessed 6 months after the surgery. Vector analysis was performed using the Alpins method to evaluate the astigmatic treatment. Results: : Twenty‐two patients (22 eyes) were enrolled. The patients' ages ranged from 37 to 61 years (45.77 years ± 4.9 [SD]); there were 12 men (54.54%) and 10 women (45.46%). Uncorrected distance visual acuity significantly improved after 6 months of treatment (0.45 ± 0.19 logarithm of the minimum angle of resolution [logMAR] preoperatively and 0.25 ± 0.19 logMAR after 6 months) ( P < .001). Moreover, the corrected distance visual acuity significantly improved at the end of the study (0.14 ± 0.13 logMAR preoperatively and 0.09 ± 0.11 logMAR after 6 months) ( P = .01). Furthermore, the aberrometric values were significantly reduced at the 6‐month visit ( P < .001). The mean of the surgically induced astigmatism was 2.15 ± 1.44 diopters. No significant complication was observed. Conclusion: : Topography‐guided single‐step transepithelial PRK is a safe and effective method for treating the irregular refractive errors in post‐RK patients.