Table 2
Repeatability of the 10 SL/O Zeiss keratometer and TMS-1 videokeratoscope on post-PKP corneas
| Observer 1 | Observer 3 | Observers 1 and 3 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Variance | Intraobserver COR | Variance | Intraobserver COR | Variance | Interobserver COR | |||||||||
| Mean (SD) | Mean (SD) | Mean (SD) | ||||||||||||
| Steep axis power (D): | ||||||||||||||
| 10 SL/O | -0.05 (0.44) | 0.88 D | -0.13 (0.47) | 0.94 D | -0.06 (0.52) | 1.04 D | ||||||||
| TMS-1 | 0.09 (0.71) | 1.42 D | 0.015 (0.91) | 1.82 D | 0.05 (0.94) | 1.88 D | ||||||||
| Flat axis power (D): | ||||||||||||||
| 10 SL/O | -0.11 (0.66) | 1.32 D | 0.04 (0.40) | 0.80 D | -0.04 (0.51) | 1.02 D | ||||||||
| TMS-1 | 0.36 (.38) | 2.76 D | -0.07 (1.89) | 3.78 D | 0.15 (1.93) | 3.86 D | ||||||||
| Astigmatism (D): | ||||||||||||||
| 10 SL/O | 0.09 (0.62) | 1.24 D | -0.13 (0.41) | 0.82 D | -0.02 (0.56) | 1.12 D | ||||||||
| TMS-1 | 0.52 (1.65) | 3.30 D | 0.08 (1.56) | 3.12 D | 0.30 (2.03) | 4.06 D | ||||||||
| Steep axis angle: | ||||||||||||||
| 10 SL/O | 2° (2°) | 4° | 4° (9°) | 18° | 4° (5°) | 10° | ||||||||
| TMS-1 | 5° (6°) | 12° | 4° (6°) | 12° | 9° (17°) | 34° | ||||||||
| Flat axis angle: | ||||||||||||||
| 10 SL/O | 3° (4°) | 8° | 5° (10°) | 20° | 5° (6°) | 12° | ||||||||
| TMS-1 | 12° (15)° | 30° | 10° (18°) | 36° | 13° (17)° | 34° | ||||||||
-
Coefficient of repeatability (COR) calculated as 2 × SD.
