Table 1.
Preoperative group comparisons
| Parameter | PRK (n = 25) | Thin-flap LASIK (n = 25) | P valuea |
|---|---|---|---|
| Mean UDVA (logMAR) ± SD | 1.286 ± 0.312 | 1.269 ± 1.178 | 0.866 |
| Mean UDVA (20/x) ± SD | 478.26 ± 283.10 | 480.65 ± 301.20 | 0.855 |
| CDVA (logMAR) ± SD | −0.0211 ± 0.0564 (−0.125 to 0.097) | −0.0211 ± 0.0564 (−0.125 to 0.097) | 1.00 |
| CDVA (20/x) ± SD | 19.2 ± 2.4 (15 to 25) | 19.2 ± 2.4 (15 to 25) | 1.00 |
| Sphere (D) ± SD | −4.67 ± 1.95 (−8.50 to −1.50) | −4.74 ± 2.07 (−7.75 to −0.60) | 0.732 |
| Cylinder (D) ± SD | 0.86 ± 0.72 (0.00 to 2.25) | 0.81 ± 0.70 (0.00 to 2.50) | 0.805 |
| Central corneal thickness (μm) ± SD | 556 ± 29 (502 to 596) | 554 ± 27 (503 to 598) | 0.719 |
Notes: Values represented as mean ± standard deviation (range);
a
Independent samples t-test.
Abbreviations: UDVA, uncorrected distance visual acuity; CDVA, corrected distance visual acuity.