Table 2 Interobserver reproducibility outcomes for biometric measurements obtained using AL-Scan partial coherence interferometry in children.

From: Precision of a new ocular biometer in children and comparison with IOLMaster

Parameter

Mean difference ± SD

Sw

TRT

CoV (%)

ICC

AL (mm)

0.01 ± 0.03

0.02

0.06

0.09

1.000

CCT (μm)

−0.02 ± 1.51

1.06

2.93

0.19

0.999

ACD (mm)

0.00 ± 0.01

0.01

0.02

0.22

0.998

Kf (D)

−0.02 ± 0.09

0.08

0.21

0.17

0.998

Ks (D)

−0.02 ± 0.11

0.06

0.18

0.15

0.998

Km (D)

−0.02 ± 0.08

0.06

0.16

0.13

0.998

Astigmatism

0.01 ± 0.12

0.09

0.24

6.68

0.989

J0 (D)

0.00 ± 0.06

0.04

0.11

 

0.990

J45 (D)

0.00 ± 0.05

0.03

0.09

 

0.976

CD (mm)

0.03 ± 0.10

0.07

0.21

0.62

0.955

PD

−0.01 ± 0.11

0.08

0.22

1.01

0.981

  1. AL = axial length, CCT = central corneal thickness, ACD = anterior chamber depth, Kf = flattest keratometry, Ks = steepest keratometry, Km = mean keratometry, CD = corneal diameter, SD = standard deviation, Sw = within-subject standard deviation, TRT = test-retest repeatability (2.77 Sw), CoV = within-subject coefficient of variation, ICC = intraclass correlation coefficient.
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