Isfahan University of Medical Sciences Journal of Isfahan Medical School 1027-7595 28 115 2010 12 22 Standard PRK Versus Q-value Adjusted Ablation PRK in Refractive Errors Standard PRK Versus Q-value Adjusted Ablation PRK in Refractive Errors 909 914 13193 FA Kobra Nasrollahi Associate Professor, Department of Ophthalmology, Feyz Hospital, Isfahan University of Medical Sciences, Isfahan, Iran. Hossein Attarzadeh Associate Professor, Department of Ophthalmology, Feyz Hospital, Isfahan University of Medical Sciences, Isfahan, Iran. Amin Masjedi Ophthalmologist, Isfahan University of Medical Sciences, Isfahan, Iran. Keyvan Jenab Ophthalmologist, Isfahan University of Medical Sciences, Isfahan, Iran. Morvarid Kavosh General Practitioner, Isfahan University of Medical Sciences, Isfahan, Iran. Journal Article 2010 11 16 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.  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.  https://jims.mui.ac.ir/article_13193_133fb38e53d861f95008113cca0fefbe.pdf