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Table 3 Predictive accuracies of the various IOL power assessment formulas for eyes with long axial length

From: Different lens power calculation formulas for the prediction of refractive outcome after phacoemulsification with silicone oil removal

Formula Predicted SE, D Mean prediction error, D# P-value† Absolute error, D
SRK/T − 0.95 ± 0.63 0.15 ± 1.16 0.121 0.78 ± 0.67
Holladay 1 −1.26 ± 0.63 0.46 ± 1.17 0.015 0.94 ± 0.63
Holladay 2 − 1.08 ± 0.65 0.28 ± 1.11 0.04 0.80 ± 0.62
Haigis −0.77 ± 0.70 −0.04 ± 1.12 0.355 0.63 ± 0.73
Hoffer Q −1.28 ± 0.77 0.49 ± 1.09 0.009 0.88 ± 0.63
Barrett Universal II −1.03 ± 0.68 0.11 ± 0.99 0.268 0.77 ± 0.68
P-value*   0.492   0.594
  1. Values are presented as the mean ± standard deviation. IOL, intraocular lens; SE, spherical equivalent; #Postoperative SE - predicted SE. †P-values derived by the Wilcoxon signed-rank test; *P-values* obtained by one-way analysis of variance