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 |
P
ANOVA |
Mean ± Sw | R | 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 e 2 | 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 e 2 | 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; P: ANOVA-test (values of P < 0.05 were considered to be indicative of significant differences); R: repeatability limits; ICC: intraclass coefficient; COV: coefficient of variation.