Table 1.
Preoperative and postoperative parameters in PRK and single-step TransPRK treated eyes
| Preoperative findings | Postoperative findings | Difference pre vs. postoperative | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Parameter | PRK (n=16 eyes) | TransPRK (n=16 eyes) | PRK (n=16 eyes) | TransPRK (n=16 eyes) | PRK (n=16 eyes) | TransPRK (n=16 eyes) | |||||||
| Mean ± SD | Range | Mean ± SD | Range | p value | Mean ± SD | Range | Mean ± SD | Range | p value | Mean+/- SD | Mean+/- SD | p value | |
| UDVA LogMAR (Snellen) | 0.79 ± 0.27 (20/147) | 0.17 - 1.3 | 0.78 ± 0.24 (20/140) | 0.39 - 1.3 | 0.913 | 0.05 ± 0.12 (20/23) | 0.39 - 0 (20/20 - 20/50) | 0.01 ± 0.03 (20/20) | 0.09 - 0 (20/20 - 20/25) | 0.206 | 0.74+/- 0.28 | 0.77+/- 0.23 | 0.743 |
| CDVA LogMAR (Snellen) | 0.006 ± 0.02 (20/20) | 0 - 0.09 (20/20 - 20/25) | 0.006 ± 0.02 (20/20) | 0 - 0.09 (20/20 - 20/25) | 1.000 | 0 (20/20) | 0 (20/20) | 0 (20/20) | 0 (20/20) | 1.000 | 0.006+/-0.02 | 0.006+/-0.02 | 1.000 |
| Sphere (D) | -1.56 ± 1.03 | -4.00 - 0 | -1.66 ± 0.74 | -2.75 - 0 | 0.755 | -0.08 ± 0.63 | -1.5 - 0.75 | 0.09 ± 0.37 | -0.75 - 0.75 | 0.366 | -1.48+/-0.91 | -1.75+/-0.73 | 0.362 |
| Cylinder (D) | -1.09 ± 1.13 | -3.5 - 0 | -0.80 ± 0.77 | -3 - 0 | 0.403 | -0.30 ± 0.41 | -1.25 - 0 | -0.28 ± 0.38 | -1.25 - 0 | 1.000 | -0.81+/-1.1 | -0.52+/-0.62 | 0.366 |
| Spherical equivalent (D) | -2.11 ± 0.91 | -4.45 -0.75 | -2.10 ± 0.71 | -3.5 -1.0 | 0.973 | -0.23 ± 0.65 | -1.6 - 0.25 | -0.05 ± 0.34 | -0.88 - 0.25 | 0.390 | -1.89+/-0.77 | -2.01+/-0.71 | 0.65 |
| Defocus Equivalent (D)* | 2.66 ± 1.10 | 1 - 5.5 | 2.45 ± 0.87 | 1 - 4.25 | 0.554 | 0.48± 0.64 | 0 - 2 | 0.33 ± 0.40 | 0 - 1.25 | 0.410 | 2.17+/-0.97 | 2.13+/-0.84 | 0.902 |
| * Defocus Equivalent = Absolute value of spherical equivalent + ½ absolute value of cylinder. |