Table 2.
Visual acuity comparisons
| Parameter |
Postoperative month 1 |
Postoperative month 3 |
Postoperative month 6 |
||||||
|---|---|---|---|---|---|---|---|---|---|
| PRK (n = 25) | Thin-flap (n = 25) | P valuea | PRK (n = 25) | Thin-flap (n = 25) | P valuea | PRK (n = 25) | Thin-flap (n = 25) | P valuea | |
| UDVA (logMAR) | 0.082 ± 0.111 | −0.012 ± 0.099 | 0.003 | −0.053 ± 0.070 | −0.046 ± 0.091 | 0.753 | −0.043 ± 0.668 | −0.061 ± 0.099 | 0.466 |
| UDVA (20/x) | 25 ± 7.36 | 20 ± 5.32 | 0.009 | 18 ± 2.89 | 18.4 ± 4.26 | 0.699 | 18.33 ± 2.82 | 17.83 ± 4.22 | 0.629 |
| SE (D) | 0.125 ± 0.978 (−3.625 to 1.165) | 0.236 ± 0.826 (−2.95 to 1.645) | 0.669 | 0.221 ± 0.532 (−1.065 to 1.215) | −0.045 ± 0.338 (−0.625 to 0.625) | 0.803 | 0.113 ± 0.557 (−0.870 to 1.450) | 0.049 ± 0.310 − (−0.500 to 0.750) | 0.277 |
| Sphere (D) | −0.340 ± 0.444 (−1.250 to 0.750) | −0.200 ± 0.280 (−0.750 to 0.000) | 0.189 | −0.180 ± 0.265 (−0.750 to 0.250) | −0.140 ± 0.315 (−0.750 to 0.500) | 0.630 | −0.229 ± 0.329 (−0.750 to 0.750) | −0.087 ± 0.288 − (−0.750 to 0.500) | 0.123 |
| Cylinder (D) | 0.590 ± 0.338 (0.000 to 1.250) | 0.290 ± 0.280 (0.000 to 1.000) | 0.001 | 0.190 ± 0.263 (0.000 to 0.750) | 0.190 ± 0.231 (0.000 to 0.750) | 1.00 | 0.304 ± 0.238 (0.000 to 0.750) | 0.298 ± 0.288 (0.000 to 1.000) | 0.932 |
Notes: Values represented as mean ± standard deviation (range);
a
Independent samples t-test.
Abbreviations: UDVA, uncorrected distance visual acuity; CDVA, corrected distance visual acuity.