Table 2.
Repeatability of tangential subtractive maps analyzed by IPP software (n = 81).
| M1 | M2 | M1−M2 | ICC | Total mean | COR (%) | |
|---|---|---|---|---|---|---|
| Distance (mm) | 0.56 ± 0.26 | 0.57 ± 0.26 | −0.01 ± 0.05 | 0.990 | 0.56 | 8.93 |
| Angle (°) | 206.24 ± 65.83 | 205.82 ± 65.51 | 0.37 ± 3.96 | 0.999 | 205.98 | 1.92 |
| Area (mm2) | 9.36 ± 2.41 | 9.19 ± 2.58 | 0.18 ± 0.12 | 0.934 | 9.28 | 1.29 |
| Roundness | 1.18 ± 0.04 | 1.19 ± 0.04 | −0.01 ± 0.03 | 0.885 | 1.19 | 2.52 |
M1: the first measurement of the first examiner; M2: the second measurement of the first examiner; M1−M2: difference between two measurements before and after the first examiner; ICC: intraclass correlation coefficient; COR: repetitive coefficient; distance: eccentric distance; angle: eccentric angle; area: area of the treatment zone (mm2); roundness: roundness of the corneal treatment zone.