Fig. 3

Receiver operating characteristic (ROC) curve generated from epithelial thickness to predict the success of medical treatment for myopic regression after LASIK. The area under the curve (AUC) was 0.902. Each point on the ROC curve represents a sensitivity/specificity pair corresponding to a particular threshold of corneal epithelial thickness at which an improvement in visual acuity of two lines or more with a change of 0.5 diopter or more can be expected, after medical treatment for myopic regression in post-LASIK eyes. Central epithelial thickness (CET) of 60.50 μm, with 81.5% sensitivity and 84.2% specificity, showed the highest Youden index