Repeatability and Agreement of Central Corneal Thickness and Keratometry Measurements between Four Different Devices
Table 2
Intraoperator repeatability measurements.
Parameter/device
ICC
95% confidence interval
Differencea (mean ± SD)
95% LoA
value
CCT [μm]
IOLMaster 700
0.999
0.998–0.999
−0.09 ± 2.76
−0.83–0.65
0.808
Pentacam HR
0.995
0.992–0.997
−0.25 ± 5.18
−1.65–1.14
0.717
Cirrus HD-OCT
0.995
0.992–0.997
0.91 ± 5.79
−0.65–2.47
0.250
J0 [D]
IOLMaster 700
0.989
0.983–0.993
0.02 ± 0.11
−0.01–0.04
0.213
Pentacam HR
0.986
0.978–0.991
−0.02 ± −0.12
−0.05–0.01
0.252
iDesign
0.994
0.991–0.996
−0.007 ± 0.07
−0.007–0.01
0.468
J45 [D]
IOLMaster 700
0.974
0.959–0.984
0.009 ± 0.08
−0.01–0.03
0.406
Pentacam HR
0.984
0.975–0.990
−0.02 ± 0.06
−0.03–0.001
0.066
iDesign
0.977
0.963–0.986
−0.01 ± 0.08
−0.03–0.01
0.304
Kmean [D]
IOLMaster 700
0.999
0.999–1.0
−0.002 ± 0.09
−0.03–0.02
0.842
Pentacam HR
0.999
0.999–1.0
−0.02 ± 0.08
−0.03–0.005
0.145
iDesign
0.992
0.987–0.995
0.05 ± 0.29
−0.03–0.13
0.211
CCT: central corneal thickness; J0: astigmatism 90/180 degrees; J45: astigmatism 45/135 degrees; Kmean: mean keratometry; ICC: intraclass correlation coefficient; LoA: limits of agreement; abetween the second measurement of each eye; values were calculated by one-sample t-test.
