Table 2.
Comparison of postoperative visual acuity and refractive errors in eyes that had transepithelial PRK or off-flap Epi-LASIK
| Transepithelial PRK | Off-flap Epi-LASIK | P Value | |||
|---|---|---|---|---|---|
| Parameter | Mean ± SD | Range | Mean ± SD | Range | |
| Refractive errors (D) | |||||
| Sphere | 0.21 ± 0.33 | −0.50, 1.00 | 0.33 ± 0.46 | −0.50, 1.25 | .218 |
| Cylindrical | −0.43 ± 0.30 | −1.00, 0.00 | −0.48 ± 0.39 | −1.50, 0.00 | .584 |
| SE | −0.01 ± 0.35 | −0.88, 0.88 | 0.08 ± 0.42 | −0.88, 1.00 | .311 |
| UDVA (logMAR) | −0.05 ± 0.09 | −0.20, 0.20 | − 0.04 ± 0.08 | −0.10, 0.20 | .326 |
| CDVA (logMAR) | −0.06 ± 0.06 | −0.10, 0.10 | − 0.05 ± 0.06 | −0.10, 0.10 | .522 |
| Efficacy index | 1.13 ± 0.16 | 0.79, 1.26 | 1.11 ± 0.19 | 0.79, 1.41 | .733 |
| Safety index | 1.15 ± 0.12 | 1.00, 1.26 | 1.14 ± 0.13 | 0.89, 1.41 | .631 |
SE Spherical equivalent, UDVA Uncorrected visual acuity, CDVA Corrected distance visual acuity, logMAR Logarithm of the minimum angle of resolution