Fig. (2) Bland-Altman plots for the comparison of the values of total keratometric flattest (TK1) and steepest (TK2) keratometric readings obtained with the IOL-Master (IOLM), Cassini (CAS) and Pentacam (PTC) devices. The dotted lines show the limits of agreement (±1.96SD). Concerning the Pentacam system, the equivalent keratometric readings (EKR) were considered as the total keratometric readings.