Fig. 3

Mean prediction errors of ten formulas with total keratometry (TK) and standard keratometry (K). XGB, XGBoost enhancement calculator; RBF 3.0, Radial Basis Function formula version 3.0; BUII, Barrett Universal II formula; K6, Cooke K6 formula; EVO 2.0, Emmetropia Verifying Optical formula version 2.0. *Statistical significance (P < 0.05) using one-sample student’s t test to compare the mean prediction errors with zero