Skip to main content
. 2019 Apr 1;4(1):e000251. doi: 10.1136/bmjophth-2018-000251

Table 4.

Prediction errors for each formula, sorted by SD

Formula MAE ME STDEV MedAE ±0.25 D ±0.50 D ±1.00 D
Kane 0.329 0.00 0.445 0.231 52.4 77.9 96.6
Olsen 0.342 0.00 0.460 0.264 47.9 77.2 96.1
Hill 2.0 0.346 0.00 0.463 0.264 48.3 75.3 96.4
Barrett 0.350 0.00 0.469 0.268 47.9 75.2 96.4
Holladay 2 0.357 0.00 0.477 0.273 46.8 76.0 95.5
Haigis 0.358 0.00 0.480 0.271 45.5 75.5 96.1
Holladay 1 0.358 0.00 0.475 0.276 45.1 73.4 96.1
SRK/T 0.369 0.00 0.489 0.293 44.7 72.1 95.9
Hoffer Q 0.381 0.00 0.499 0.311 40.3 73.6 95.5

MAE, mean absolute prediction error;ME, mean prediction error;MedAE, median absolute prediction error; ST DEV, SD deviation of the prediction error.