Accuracy of Intraocular Lens Power Formulas Involving 148 Eyes with Long Axial Lengths: A Retrospective Chart-Review Study

Table 4

Median absolute errors (D) calculated by each formula for Groups A–D.

Formula	Group A; ()	Group B; ()	Group C; ()	Group D; ()
Haigis	1.080	0.805	1.160	2.145
Hoffer Q	1.420	1.635	1.710	3.430
Holladay	1.290	1.530	1.410	2.695
SRK/T	1.040	0.975	0.990	2.555
-value^†	0.002	0.002	0.010	/

Compared with the results achieved with Group D (repeated-measures ANOVA).
Group A: AL = 26.01–28.00 mm, Group B: AL = 28.01–30.00 mm, Group C: AL = 30.01–33.00 mm, and Group D: AL = 33.01–36.00 mm.
D, diopters.