Table 4 Postoperative refraction estimation: mean arithmetic refractive error (MRE), mean absolute refractive error (MARE), refractive error (RE) range, and p values of the statistical tests performed, for the different methods.

From: Estimation of intraocular lens position from full crystalline lens geometry: towards a new generation of intraocular lens power calculation formulas

Method

MRE ± SD (D)

P value (t-test)

MARE ± SD (D)

RE range (D)

P value (multiple test, Bonferroni correction)

Proposed

−0.09 ± 0.37

0.41

0.24 ± 0.29

−1.08 to 0.33

—

Olsen Constant

−0.04 ± 0.46

0.75

0.36 ± 0.27

−0.95 to 0.63

1

Olsen C optimized

−0.08 ± 0.46

0.54

0.37 ± 0.26

−1.00 to 0.58

1

SRK/T

0.20 ± 0.53

0.23

0.47 ± 0.28

−0.73 to 0.93

0.16

SRK/T A optimized

−0.08 ± 0.53

0.61

0.41 ± 0.31

−1.20 to 0.62

1

Intersection approach

0.03 ± 0.44

0.81

0.37 ± 0.23

−0.83 to 0.53

0.12

  1. MRE = mean arithmetic refractive error; MARE = mean absolute refractive error; SD = Standard deviation;
  2. EE = Estimation error; D = diopters.
  3. ƗRE significantly different from zero (t-test).
  4. *MARE significantly different than the proposed method (with Bonferroni correction).
Back to article page