Table 2 The mean difference, paired t-test, 95% LoA and ICC for biometric measurements differences between the two different operators based on the average method (from average of 3 consecutive readings from each operator) using OA-2000 swept-source optical coherence tomography in cataract patients.

From: Precision of a new ocular biometer in eyes with cataract using swept source optical coherence tomography combined with Placido-disk corneal topography

Device Pairings

Mean Difference ± SD

P Value*

95% LoA

ICC (95% CI)

AL (mm)

0.00 ± 0.01

0.541

−0.02 to 0.03

1.000 (0.999 to 1.000)

CCT (μm)

−0.58 ± 2.98

0.092

−6.43 to 5.27

0.996 (0.993 to 0.997)

ACD (mm)

0.00 ± 0.03

0.565

−0.06 to 0.06

0.996 (0.993 to 0.997)

LT (mm)

0.00 ± 0.08

0.647

−0.16 to 0.15

0.979 (0.967 to 0.987)

Ks (Φ = 2.5) (D)

−0.01 ± 0.12

0.706

−0.25 to 0.24

0.997 (0.995 to 0.998)

Kf (Φ = 2.5) (D)

0.00 ± 0.13

0.853

−0.25 to 0.25

0.997 (0.995 to 0.998)

Km (Φ = 2.5) (D)

0.00 ± 0.09

0.924

−0.19 to 0.18

0.998 (0.997 to 0.999)

Ks (Φ = 3.0) (D)

0.01 ± 0.13

0.543

−0.24 to 0.26

0.997 (0.995 to 0.998)

Kf (Φ = 3.0) (D)

0.00 ± 0.10

0.892

−0.19 to 0.20

0.998 (0.997 to 0.999)

Km (Φ = 3.0) (D)

0.01 ± 0.08

0.556

−0.15 to 0.16

0.999 (0.998 to 0.999)

WTW (mm)

0.01 ± 0.14

0.542

−0.27 to 0.29

0.925 (0.886 to 0.952)

  1. AL = Axial length, ACD = anterior chamber depth, K = keratometry, WTW = white to white, SD = Standard deviation.
  2. *Two ways.
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