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Table 2 Comparison of the corneal power and WTW distance measurements in age <19 years old and age ≥19 years old groups

From: Comparison of the Orbscan II topographer and the iTrace aberrometer for the measurements of keratometry and corneal diameter in myopic patients

groups

parameters

Orbscan II

iTrace

P Valuea

95 % LoA

age <19

Kf (D)

42.29 ± 1.38

41.84 ± 1.45

<0.0001

−0.16,1.07

years old

Ks (D)

43.47 ± 1.65

42.95 ± 1.71

<0.0001

−0.08,1.11

(n = 40)

WTW (mm)

11.60 ± 0.29

11.37 ± 0.30

<0.0001

0.00,0.45

age ≥19

Kf (D)

42.74 ± 1.30

42.20 ± 1.26

<0.0001

−0.23,1.30

years old

Ks (D)

43.96 ± 1.51

43.39 ± 1.45

<0.0001

−0.19,1.34

(n = 60)

WTW (mm)

11.55 ± 0.36

11.30 ± 0.39

<0.0001

0.01,0.48

  1. Data are expressed as mean ± SD; apaired t test <0.05 considered significant; Kf = flat axis power; Ks = steep axis power, D = diopter, LoA = limits of agreement
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BMC Ophthalmology

ISSN: 1471-2415

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