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 |
P
ANOVA |
Mean ± Sw | R | 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; 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.