Table 3. Mean predicted error by five formulas.

Formula	ME (D)
	AL≤22mm (n = 41)	22<AL≤24.5mm (n = 45)	AL>24.5mm (n = 26)	entire AL(n = 112)
SRK/T	-0.26	-0.28	-0.29	-0.28
Haigis	-0.65	-0.29	0.27	-0.29
Hoffer Q	-0.13	0.25	0.72	0.22
Holladay	-0.01	0.11	0.30	0.11
Barrett	-0.08	0.02	0.11	0.003
P value	<0.001*	<0.001*	<0.001*	<0.001*

AL = axial length; MAE = Mean predicted error; Barrett = Barrett Universal II; *indicates P<0.05.