Accuracy of Intraocular Lens Power Calculation Formulas for Highly Myopic Eyes

Table 3

Mean numerical error (MNE) and mean absolute error (MAE) for formulas and groups.

Formula	Plus-power IOL		Minus-power IOL		Zero-power IOL		All
	MNE (D)	MAE (D)	MNE (D)	MAE (D)	MNE (D)	MAE (D)	MNE (D)	MAE (D)
SRK/T
Mean ± SD	0.03 ± 0.50	0.39 ± 0.30	−0.06 ± 0.92	0.78 ± 0.46	1.34	1.34	0.03 ± 0.55	0.43 ± 0.34
Range	−1.85 to 1.11	0.00 to 1.85	−1.57 to 1.23	0.04 to 1.57	—	—	−1.85 to 1.34	0.00 to 1.85
Haigis
Mean ± SD	0.13 ± 0.44	0.37 ± 0.28	0.08 ± 0.83	0.71 ± 0.50	1.18	1.18	0.13 ± 0.49	0.40 ± 0.31
Range	−2.01 to 1.08	0.00 to 2.01	−1.27 to 1.21	0.04 to 1.37	—	—	−2.01 to 1.21	0.00 to 2.01
Holladay
Mean ± SD	0.43 ± 0.55	0.59 ± 0.38	−0.04 ± 1.04	0.87 ± 0.53	1.69	1.69	0.40 ± 0.63	0.62 ± 0.41
Range	−1.39 to 1.72	0.00 to 1.72	−1.20 to 3.34	0.11 to 1.88	—	—	−1.88 to 1.72	0.00 to 1.88
Hoffer Q
Mean ± SD	0.37 ± 0.59	0.57 ± 0.39	0.05 ± 1.05	0.9 ± 0.13	2	2	0.35 ± 0.66	0.61 ± 0.43
Range	−1.41 to 1.72	0.00 to 1.72	−1.49 to 1.72	0.18 to 1.72	—	—	−1.49 to 2.00	0.00 to 2.00
Barrett Universal II
Mean ± SD	0.04 ± 0.42	0.31 ± 0.29	0.08 ± 0.76	0.56 ± 0.49	0.71	0.71	0.05 ± 0.46	0.33 ± 0.32
Range	−1.07 to 1.84	0.00 to 1.84	−2.11 to 1.01	0.10 to 2.11	—	—	−2.11 to 1.84	0.00 to 2.11