Repeatability of Ocular Measurements with a Dual-Scheimpflug Analyzer in Healthy Eyes
Table 3
Mean instantaneous corneal parameters and standard deviations, ANOVA test, repeatability, intraclass coefficients, and coefficients of variation in healthy eyes.
Instantaneous Parameters
Mean1 ± SD
Mean2 ± SD
Mean3 ± SD
ANOVA
Mean ± Sw
ICC (lower 95% CI)
COV (%)
AI SimK Steepest (D)
44.12 ± 1.44
44.16 ± 1.81
44.03 ± 1.48
0.426
44.10 ± 1.53
4.24
0.96 (0.95)
3.47
AI SimK flattest (D)
43.27 ± 1.48
43.23 ± 1.49
43.17 ± 1.42
0.097
43.22 ± 1.45
4.02
0.99 (0.98)
3.36
AI SimK average (D)
43.69 ± 1.43
43.69 ± 1.62
43.60 ± 1.42
0.277
43.66 ± 1.47
3.86
0.98 (0.97)
3.36
AI curvature average in (D)
43.73 ± 1.38
43.73 ± 1.44
43.67 ± 1.41
0.337
43.71 ± 1.39
3.46
0.99 (0.98)
3.19
AI curvature average mid (D)
41.70 ± 1.21
41.70 ± 1.29
41.81 ± 1.53
0.565
41.74 ± 1.25
7.06
0.92 (0.87)
2.99
AI curvature average out (D)
38.17 ± 2.43
38.14 ± 2.18
38.45 ± 3.02
0.458
38.50 ± 2.55
7.07
0.55 (0.29)
6.62
AI curvature
0.23 ± 0.16
0.24 ± 0.16
0.25 ± 0.17
0.571
0.24 ± 0.16
0.45
0.81 (0.70)
66.67
PI curvature average in (D)
−6.34 ± 0.28
−6.33 ± 0.25
−6.33 ± 0.26
0.690
−6.33 ± 0.26
0.72
0.98 (0.97)
4.10
PI curvature average mid (D)
−5.95 ± 0.37
−5.32 ± 0.30
−5.91 ± 0.29
0.571
−5.92 ± 0.33
0.92
0.71 (0.53)
5.58
PI curvature average out (D)
−5.18 ± 0.35
−5.22 ± 0.47
−5.14 ± 0.55
0.627
−5.19 ± 0.46
1.28
0.66 (045)
8.86
PI curvature
0.19 ± 0.23
0.18 ± 0.23
0.22 ± 0.25
0.638
0.18 ± 0.23
0.64
0.88 (0.81)
127.78
AI: anterior instantaneous; PI: posterior instantaneous; SD: standard deviation; Sw: within-subject SD; : ANOVA-test (values of were considered to be indicative of significant differences); : repeatability limits; ICC: intraclass coefficient; COV: coefficient of variation.
