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

Table 3

Percentages of eyes with different absolute errors at different refractive thresholds.

Formula	Percentages of eyes with indicated absolute error (P value^†)
	<0.5 D	<1.0 D	<2.0 D	<3.0 D
Haigis	23.65%	49.32%	77.03%	91.89%
Hoffer Q	16.89% (0.148)	33.78% (0.007)	63.51% (0.011)	81.76% (0.010)
Holladay 1	18.24% (0.253)	32.43% (0.003)	68.24% (0.090)	87.16% (0.184)
SRK/T	19.60% (0.397)	47.97% (0.816)	76.35% (0.891)	89.86% (0.545)

Compared with results achieved using the Haigis formula (Chi-square test). D, diopters.