Table 2.
Mean axial corneal parameters and standard deviations, ANOVA test, repeatability, intraclass coefficients, and coefficients of variation in healthy eyes.
| Axial parameters | Mean1 ± SD | Mean2 ± SD | Mean3 ± SD |
P
ANOVA |
Mean ± Sw | R | ICC (lower 95% CI) |
COV (%) |
|---|---|---|---|---|---|---|---|---|
| Anterior best fit sphere (mm) | 7.78 ± 0.25 | 7.78 ± 0.25 | 7.78 ± 0.24 | 0.286 | 7.78 ± 0.25 | 0.68 | 1.00 (0.95) | 3.14 |
| AA SimK steepest (D) | 44.22 ± 1.43 | 44.23 ± 1.45 | 44.13 ± 1.53 | 0.448 | 44.19 ± 1.43 | 3.95 | 0.97 (0.95) | 3.23 |
| AA SimK flattest (D) | 43.43 ± 1.42 | 43.40 ± 1.35 | 43.34 ± 1.58 | 0.666 | 43.39 ± 1.40 | 3.87 | 0.96 (0.94) | 3.22 |
| AA SimK average (D) | 43.82 ± 1.40 | 43.82 ± 1.38 | 43.74 ± 1.53 | 0.543 | 43.79 ± 1.39 | 3.86 | 0.97 (0.95) | 3.18 |
| AA curvature average in (D) | 43.84 ± 1.40 | 43.84 ± 1.36 | 43.75 ± 1.55 | 0.518 | 43.81 ± 1.39 | 3.84 | 0.96 (0.94) | 3.17 |
| AA Curvature average mid (D) | 43.38 ± 1.32 | 43.38 ± 1.39 | 43.35 ± 1.32 | 0.408 | 43.37 ± 1.34 | 3.71 | 1.00 (0.99) | 3.09 |
| AA curvature average out (D) | 42.57 ± 1.21 | 42.56 ± 1.22 | 42.59 ± 1.28 | 0.881 | 42.57 ± 1.20 | 3.32 | 0.97 (0.96) | 2.82 |
| Posterior best fit sphere (mm) | 6.39 ± 0.29 | 6.42 ± 0.25 | 6.41 ± 0.25 | 0.172 | 6.41 ± 0.26 | 0.70 | 0.96 (0.94) | 3.97 |
| PA SimK steepest (D) | −6.51 ± 0.29 | −6.54 ± 0.37 | −6.51 ± 0.31 | 0.356 | −6.52 ± 0.31 | 0.85 | 0.93 (0.89) | 4.68 |
| PA SimK flattest (D) | −6.17 ± 0.25 | −6.18 ± 0.26 | −6.17 ± 0.28 | 0.589 | −6.17 ± 0.26 | 0.71 | 0.98 (0.96) | 4.14 |
| PA SimK average (D) | −6.34 ± 0.27 | −6.36 ± 0.30 | −6.34 ± 0.29 | 0.356 | −6.35 ± 0.28 | 0.76 | 0.96 (0.94) | 4.32 |
| PA curvature average in (D) | −6.34 ± 0.27 | −6.37 ± 0.30 | −6.35 ± 0.29 | 0.438 | −6.35 ± 0.28 | 0.77 | 0.95 (0.93) | 4.36 |
| PA curvature average mid (D) | −6.28 ± 0.29 | −6.23 ± 0.25 | −6.26 ± 0.24 | 0.133 | −6.25 ± 0.24 | 0.67 | 0.92 (0.87) | 3.86 |
| PA curvature average out (D) | −6.11 ± 0.28 | −6.01 ± 0.46 | −6.08 ± 0.22 | 0.152 | −6.07 ± 0.25 | 0.69 | 0.60 (0.38) | 4.10 |
AA: anterior axial; PA: posterior axial; 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.