Table 2.
Effects of orthokeratology on refraction and corneal curvature (n=22 eyes, mean ± SD).
| Time | Sphere (D) | Cylinder (D) | K1 (D) | K2 (D) |
|---|---|---|---|---|
| AM baseline | −3.83 ± 0.97 | −0.47 ± 0.43 | 42.05 ± 1.26 | 43.19 ± 1.37 |
| AM 1 month | −1.03 ± 0.85 | −0.69 ± 0.57 | 39.75 ± 0.97 | 40.64 ± 1.27 |
| PM 1 month | −1.10 ± 0.68 | −0.66 ± 0.52 | 40.02 ± 1.05 | 40.95 ± 1.27 |
| P1 | <0.001 | 0.155 | <0.001 | <0.001 |
| P2 | 0.568 | 0.500 | <0.001 | <0.001 |
Paired t-test. P1: comparison between AM baseline and AM 1 month after orthokeratology; P2: comparison between AM and PM during the same day 1 month after orthokeratology; K1: flat keratometric value; K2: steep keratometric value.