Alcohol-assisted versus Mechanical Epithelium Removal in Photorefractive Keratectomy

• Main Authors: Mohammad Ghoreishi, Hossein Attarzadeh, Mehdi Tavakoli, Heidar Ali Moini, Alireza Zandi, Amin Masjedi, Akram Rismanchian
• Format: Article
• Language: English
• Published: Knowledge E 2010-01-01
• Series: Journal of Ophthalmic & Vision Research
• Subjects: Photorefractive Keratectomy; Lasers; Excimer; Epithelial Debridement; Ethanol
• Online Access: http://www.jovr.org/article.asp?issn=2008-322X;year=2010;volume=5;issue=4;spage=223;epage=227;aulast=Ghoreishi,

Purpose: To compare the outcomes and complications of alcohol-assisted versus mechanical corneal epithelial debridement for photorefractive keratectomy (PRK). Methods: This randomized controlled trial included 1,250 eyes of 625 patients undergoing PRK for correction of myopia and myopic astigmatism. Each patient was randomly assigned to alcohol-assisted or mechanical epithelial removal. Results: A total of 658 eyes underwent alcohol-assisted epithelial removal while the epithelium was removed mechanically in 592 eyes. Mean spherical equivalent was ‑4.37}2.3 D in the alcohol group and ‑3.8}1.3 D in the mechanical group (P = 0.78). There was no significant difference in postoperative pain between the study groups (P = 0.22). Uncorrected visual acuity ≥ 20/20 and ≥ 20/40 was achieved in 90.9% versus 93.4% (P = 0.08), and 98.9% versus 99.5% (P = 0.36) of eyes in the alcohol and mechanical groups, respectively. Final refractive error within 1D of emmetropia was achieved in 90% versus 92.2% of eyes in the alcohol and mechanical groups, respectively (P = 0.23). Alcohol-assisted debridement required less time than mechanical debridement (96±18 vs. 118±26 seconds, P=0.035). There was no significant difference between the two groups in terms of early and late postoperative complications. Conclusion: Alcohol-assisted and mechanical epithelium removal are comparable in terms of efficacy and side effects. The method of epithelial debridement in PRK may be left to the surgeon′s choice.