Analysis of cases and accuracy of 3 risk scoring systems in predicting ectasia after laser in situ keratomileusis

Purpose To identify risk factors for ectasia after laser in situ keratomileusis (LASIK) by comparing the accuracy of the Ectasia Risk Score System (ERSS), Screening Corneal Objective Risk of Ectasia (SCORE) Analyzer, and percentage of tissue altered (PTA) in predicting the occurrence of ectasia. Setting Multiple centers in 8 countries. Design Retrospective case series. Methods Previously unpublished post-LASIK ectasia cases were analyzed....