Figure 2

Proportional graph of eyes within ± 0.25 D, ± 0.50 D, and ± 1.00 D of prediction error of each formula using conventional keratometry and total keratometry. K conventional keratometry, TK total keratometry.
Proportional graph of eyes within ± 0.25 D, ± 0.50 D, and ± 1.00 D of prediction error of each formula using conventional keratometry and total keratometry. K conventional keratometry, TK total keratometry.