Repeatability of Ocular Measurements with a Dual-Scheimpflug Analyzer in Healthy Eyes
Table 4
Mean refractive power, total corneal power (ray traced) and standard deviations, ANOVA test, repeatability, intraclass coefficients, and coefficients of variation in healthy eyes.
Refractive power and Total corneal power
Mean1 ± SD
Mean2 ± SD
Mean3 ± SD
ANOVA
Mean ± Sw
ICC (lower 95% CI)
COV (%)
RP SimK steepest (D)
44.57 ± 1.47
44.58 ± 1.49
44.47 ± 1.56
0.446
44.54 ± 1.46
4.05
0.97 (0.95)
3.28
RP SimK flattest (D)
43.76 ± 1.45
43.73 ± 1.39
43.67 ± 1.61
0.665
43.72 ± 1.43
3.97
0.96 (0.94)
3.28
RP SimK average (D)
44.16 ± 1.44
44.15 ± 1.41
44.07 ± 1.57
0.541
44.13 ± 1.43
3.95
0.97 (0.95)
3.23
RP average in (D)
44.10 ± 1.42
44.09 ± 1.39
44.00 ± 1.58
0.515
44.06 ± 1.41
3.91
0.96 (0.94)
3.21
RP average mid (D)
44.96 ± 1.47
44.95 ± 1.55
44.92 ± 1.48
0.436
44.94 ± 1.49
4.13
1.00 (0.99)
3.32
RP average out (D)
45.42 ± 1.47
45.41 ± 1.48
45.45 ± 1.55
0.864
45.43 ± 1.46
4.05
0.97 (0.96)
3.22
TCP (RT) SimK steepest (D)
42.37 ± 1.34
42.39 ± 1.38
42.27 ± 1.44
0.327
42.34 ± 1.34
3.72
0.97 (0.95)
3.17
TCP (RT) SimK flattest (D)
41.70 ± 1.33
41.63 ± 1.27
41.60 ± 1.48
0.606
41.64 ± 1.30
3.59
0.95 (0.92)
3.11
TCP (RT) SimK average (D)
42.03 ± 1.32
42.01 ± 1.29
41.93 ± 1.44
0.507
41.99 ± 1.30
3.61
0.96 (0.94)
3.10
TCP (RT) average in (D)
41.99 ± 1.31
41.96 ± 1.27
41.89 ± 1.47
0.490
41.95 ± 1.29
3.58
0.96 (0.93)
3.09
TCP (RT) average mid (D)
42.54 ± 1.28
42.58 ± 1.47
42.53 ± 1.34
0.528
42.55 ± 1.35
3.74
0.99 (0.98)
3.17
TCP (RT) average out (D)
42.71 ± 1.28
42.78 ± 1.34
42.80 ± 1.41
0.646
42.76 ± 1.28
3.54
0.95 (0.92)
2.99
RP: refractive power; TCP (RT): total corneal power (ray traced); 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.
