Table 1 Baseline characteristics of eyes that had transepithelial PRK or off-flap Epi-LASIK
| Â | Transepithelial PRK | Off-flap Epi-LASIK | P value | ||
|---|---|---|---|---|---|
Parameter | Mean ± SD | Range | Mean ± SD | Range | |
Refractive errors (D) | |||||
 Sphere | −6.03 ± 1.97 | −9.50, −2.50 | − 6.18 ± 2.01 | −9.75, − 2.50 | .363 |
 Cylindrical | −1.09 ± 0.72 | −3.00, 0.00 | − 1.03 ± 0.73 | − 3.50, 0.00 | .616 |
 SE | −6.57 ± 2.01 | −10.00, − 2.88 | − 6.67 ± 1.99 | − 10.25, − 2.88 | .519 |
UDVA (logMAR) | 1.07 ± 0.22 | 0.50, 1.60 | 1.08 ± 0.23 | 0.50, 1.60 | .730 |
CDVA (LogMAR) | −0.003 ± 0.05 | −0.10, 0.10 | 0.003 ± 0.04 | −0.10, 0.10 | .423 |
CCT (um) | 498.78 ± 23.81 | 465.00, 570.00 | 499.00 ± 22.53 | 462.00, 556.00 | .789 |
Total ablation zone (mm) | 7.95 ± 0.32 | 6.70, 8.44 | 7.47 ± 0.26 | 6.89, 8.14 | <.001 |
Optical zone (mm) | 6.30 ± 0.32 | 5.80, 7.00 | 6.30 ± 0.35 | 5.80, 7.00 | .872 |
Stromal ablation depth (um) | 99.58 ± 23.18 | 44.00, 133.00 | 101.19 ± 19.40 | 61.00, 129.00 | .232 |