Photorefractive keratectomy in Hyperopia: Refractive outcomes and Patients' satisfaction

Abstract

Background: This study was aimed to describe the factors that influence on refractive outcomes and patients' satisfaction after hyperopic photorefractive keratectomy (PRK). Methods: 80 patients including 133 eyes undergoing primary PRK with a refractive target of emmetropia were assessed in this study. Patients underwent refractometry and Ophthalmologic examinations before and after operation. Refractive outcomes and patients' satisfaction, as the main studied variables, were assessed in patients. Liner and logistic regression were use the relation between satisfaction, predictability (- 0.5D POST OP SE= 0.5 D) as an indicator of refractive outcome, efficacy index and safety index, both as the indicators of visual outcome, with other studied variables. Results: The mean of uncorrected visual acuity (UCVA) (log MAR before operation was 0.47 and after that was 0.07 (P-value=0.0001). The mean of postoperative best corrected visual acuity (BCVA) was not significantly different from preoperative. The mean of defocus equivalent was 1.35 +/- 0.94 before operation and 0.22 +/- 0.49 after operation. The mean of safety and efficacy were 1.01 and 0.91, respectively. Mean of patients' satisfaction score was 41.41 +/- 2.6 of 52 (Total Score). About predictability, 72.2 of studied eyes had post op SE within +/- 0.5 D of the intended refraction. Preoperative BCVA, index of success of astigmatism surgery and absolute angle of error were correlated variables to predict safety and efficacy index. Corneal haze was significantly correlated to predict patients' satisfaction score. Preoperative UCVA was significantly correlated to predictability. Conclusion: Our findings suggest that PRK is a safe, predictable, and effective with good patients' satisfaction way of correcting of refractive error in hyperopic patients.