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Table 2 Refractive outcomes and optimized constants obtained by each formula in all eyes

From: The effect of corneal power on the accuracy of 14 IOL power formulas

Formula

Optimized Constants

PE

SD

MAE

MedAE

Eyes within PE (%)

PE ≤ 0.25 D

PE ≤ 0.50 D

PE ≤ 0.75 D

PE ≤ 1.00 D

PE ≤ 2.00 D

Barrett Universal II

1.940

0.000

0.425

0.319

0.237

53.27

78.87

91.37

97.92

100.00

Castrop

0.420

0.150

0.003

0.442

0.348

0.281

45.24

75.30

89.58

97.02

100.00

EVO 2.0

119.068

0.000

0.403

0.306

0.236

54.17

78.87

94.64

98.21

100.00

Hoffer QST

5.620

0.000

0.416

0.318

0.255

50.30

79.46

92.56

97.62

100.00

Cooke K6

119.250

0.000

0.399

0.305

0.234

52.38

80.06

94.35

97.92

100.00

Kane

119.043

0.000

0.404

0.307

0.238

52.38

78.87

93.15

97.62

100.00

Karmona

119.430

0.005

0.415

0.325

0.250

51.79

78.57

93.45

97.92

100.00

Naeser 2

1.439

0.940

0.004

0.447

0.342

0.259

50.30

76.79

90.77

96.43

100.00

Olsen (OLCR)

4.94

0.000

0.459

0.364

0.302

43.75

74.11

89.88

97.02

100.00

Pearl-DGS

119.299

0.000

0.408

0.313

0.243

53.57

77.98

93.15

98.21

100.00

RBF 3.0

119.031

0.000

0.404

0.306

0.233

53.27

80.95

93.15

98.51

100.00

T2

119.034

0.000

0.424

0.327

0.266

49.70

77.38

92.26

96.73

100.00

VRF

5.598

0.001

0.445

0.342

0.273

48.21

75.00

90.77

97.62

100.00

VRF-G

119.088

0.002

0.403

0.305

0.238

52.38

81.55

94.64

97.62

100.00

  1. PE = mean prediction error. SD = standard deviation of the error. MedAE = median absolute error. MAE = mean absolute error. D = diopter