The Accuracy of Estimating Postoperative Deviation in Exotropia With over 40 Prism Diopters

Purpose: To assess the accuracy of estimating postoperative deviation in large-angle exotropia over 40 prism diopters (PD). Methods: A retrospective analysis was performed on 61 exotropia patients with over 40 PD exotropia who had undergone 2-muscle surgery by two surgeons and with at least 6 months follow-up. The accuracy was assessed by analyzing the discrepancy between preoperatively predicted residual deviation and deviation at postoperative...