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Table 4 Intraobserver repeatability outcomes for corneal power obtained using Pentacam Scheimpflug imaging in children

From: The precision and agreement of corneal thickness and keratometry measurements with SS-OCT versus Scheimpflug imaging

Parameter

Observer

Mean ± SD

Sw

TRT

CoV (%)

ICC (95% CI)

Km

1st

43.13 ± 1.44

0.09

0.26

0.21

0.996 (0.994 to 0.997)

2nd

43.14 ± 1.44

0.09

0.26

0.22

0.996 (0.994 to 0.997)

J0

1st

−0.71 ± 0.45

0.09

0.25

0.962 (0.945 to 0.974)

2nd

−0.70 ± 0.45

0.09

0.25

0.961 (0.944 to 0.974)

J45

1st

−0.03 ± 0.21

0.11

0.30

0.766 (0.682 to 0.835)

2nd

−0.04 ± 0.22

0.10

0.27

0.832 (0.767 to 0.883)

Nasal 2 mm

1st

42.23 ± 1.40

0.16

0.43

0.37

0.988 (0.982 to 0.992)

2nd

42.25 ± 1.40

0.16

0.43

0.37

0.988 (0.982 to 0.992)

Superior 2 mm

1st

43.84 ± 1.63

0.25

0.69

0.57

0.977 (0.967 to 0.984)

2nd

43.86 ± 1.66

0.23

0.63

0.52

0.982 (0.973 to 0.988)

Temporal 2 mm

1st

42.73 ± 1.37

0.19

0.52

0.44

0.981 (0.973 to 0.987)

2nd

42.74 ± 1.37

0.18

0.50

0.42

0.983 (0.975 to 0.988)

Inferior 2 mm

1st

43.79 ± 1.71

0.25

0.69

0.57

0.979 (0.970 to 0.986)

2nd

43.77 ± 1.68

0.22

0.60

0.50

0.983 (0.976 to 0.989)

Nasal 5 mm

1st

41.94 ± 1.40

0.12

0.32

0.28

0.993 (0.990 to 0.995)

2nd

41.96 ± 1.41

0.11

0.31

0.27

0.994 (0.991 to 0.996)

Superior 5 mm

1st

43.50 ± 1.58

0.35

0.98

0.81

0.952 (0.931 to 0.967)

2nd

43.51 ± 1.61

0.23

0.63

0.53

0.980 (0.971 to 0.987)

Temporal 5 mm

1st

42.48 ± 1.33

0.11

0.29

0.25

0.994 (0.991 to 0.996)

2nd

42.48 ± 1.34

0.10

0.29

0.24

0.994 (0.991 to 0.996)

Inferior 5 mm

1st

43.62 ± 1.56

0.17

0.46

0.38

0.989 (0.983 to 0.992)

2nd

43.60 ± 1.54

0.14

0.38

0.32

0.992 (0.988 to 0.995)

  1. Keratometric data are in units of diopter (D); 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