Table 3 Descriptive statistics, repeatability metrics and agreement results for the IOL power calculated by different formulas.

From: Evaluation of repeatability and agreement of two optical biometers for intraocular lens power calculation

Formula

Instrument

Mean ± SD

RLimit

Mean difference

LoA interval [range]

Barrett (D)

Lenstar

20.13 ± 3.86

0.54

0.16

1.26 [-0.47; 0.79]

Eyestar

19.97 ± 3.83

0.40

Haigis (D)

Lenstar

20.40 ± 3.99

0.51

0.00

0.99 [-0.50; 0.49]

Eyestar

20.41 ± 3.98

0.42

Hill (D)

Lenstar

20.45 ± 4.09

0.48

0.32

1.34 [-0.35; 0.99]

Eyestar

20.13 ± 4.05

0.40

Hoffer (D)

Lenstar

20.18 ± 4.15

0.47

0.00

1.02 [-0.51; 0.51]

Eyestar

20.19 ± 4.14

0.41

Holladay (D)

Lenstar

20.16 ± 3.98

0.50

-0.02

1.12 [-0.58; 0.54]

Eyestar

20.18 ± 3.96

0.49

SRK/T (D)

Lenstar

20.21 ± 3.90

0.48

0.00

0.99 [-0.50; 0.49]

Eyestar

20.21 ± 1.35

0.37

  1. RLimit: limit of repeatability, LoA: limit of agreement.