Table 2. Inter-examiner reproducibility of corneal power measurements by Placido disk-based topography and high-resolution rotating Scheimpflug camera in eyes with keratoconus.
| Parameters | 1P | Sw (D) | R (D) | CoV (%) | ICC (95% CI) |
| Kf | |||||
| Placido | 0.06 | 0.29 | 0.81 | 0.65 | 0.968 (0.936-0.984) |
| Scheimpflug | 0.56 | 0.08 | 0.21 | 0.17 | 0.998 (0.996-0.999) |
| Ks | |||||
| Placido | 0.05 | 0.35 | 0.98 | 0.74 | 0.986 (0.972-0.993) |
| Scheimpflug | 0.74 | 0.14 | 0.40 | 0.30 | 0.998 (0.995-0.999) |
| Km | |||||
| Placido | 0.06 | 0.31 | 0.87 | 0.68 | 0.980 (0.959-0.990) |
| Scheimpflug | 0.58 | 0.09 | 0.26 | 0.20 | 0.998 (0.996-0.999) |
| Ks-Kf | |||||
| Placido | 0.27 | 0.19 | 0.52 | 5.97 | 0.990 (0.981-0.995) |
| Scheimpflug | 0.34 | 0.14 | 0.38 | 4.70 | 0.993 (0.986-0.997) |
Kf: Flat keratometry; Ks: Steep keratometry; Km: Mean keratometry; Ks-Kf: Astigmatism; D: Diopters; Sw: Within-subject standard deviation; R: Coefficient of repeatability; CoV: Coefficient of variation; ICC: Intraclass correlation coefficient. 1Wilcoxon's signed-rank test.