Standard Prk Versus Q-Value Adjusted Ablation Prk in Refractive Errors



Nasrollahi K¹ ; Attarzadeh H¹ ; Masjedi A¹ ; Jenab K² ; Kavosh M²
Source: Journal of Isfahan Medical School Published:2011

Abstract

Background: This study aimed to evaluate the difference between the effect of standard photorefractive keratectomy (PRK) and Q-value adjusted ablation PRK with Allegretto Eye-Q on the ocular refraction. Methods: In this clinical trial study performed in Parsian clinic of Isfahan, 75 candidates for photorefractive surgery were included. All of these patients underwent standard PRK in one eye and Q-value adjusted ablation PRK in the other eye. The efficacy of therapy was measured by visual acuity, contrast sensitivity, subjective refraction and patients' satisfaction, 3 months after the surgery. Finding: The mean score of postoperative visual acuity in standard PRK group and Q-value adjusted group was 10.48 ± 1.38 and 10.51 ± 1.22 respectively without correction. The mean postoperative refraction of standard PRK and Q-value adjusted PRK was 0 ± 0.37 and 0.05 ± 0.3 respectively. There was no significant statistical difference in visual acuity, refraction, contrast sensitivity and postoperative satisfaction between the two groups. Conclusion: There is no significant difference between efficacy of standard PRK and Q-value adjusted PRK in optimizing visual acuity, subjective refraction, contrast sensitivity and patient satisfaction.