Table 3.
Preoperative vs postoperative HOAs after small-incision lenticule extraction for correcting myopia and myopic astigmatism
| Preoperative | 6 Months Postoperative | |||||
|---|---|---|---|---|---|---|
| Parameters (Mean ± SD) | group 1 | group 2 | P Value | group 1 | group 2 | P Value |
| HOA RMS | 0.23 ± 0.092 | 0.21 ± 0.067 | 0.48 | 0.36 ± 0.11 | 0.41 ± 0.13 | 0.09 |
| Spherical Aberration | 0.084 ± 0.080 | 0.071 ± 0.040 | 0.42 | 0.094 ± 0.067 | 0.20 ± 0.12 | < 0.01 |
| Coma | 0.13 ± 0.091 | 0.11 ± 0.072 | 0.33 | 0.26 ± 0.13 | 0.25 ± 0.14 | 0.94 |
| Trefoil | 0.12 ± 0.054 | 0.10 ± 0.067 | 0.44 | 0.13 ± 0.073 | 0.11 ± 0.070 | 0.34 |
| Preoperative compared with 6 Months Postoperative | ||||||
| Parameters | group 1 | group 2 | ||||
| (Mean ± SD) | Mean Difference | P Value | Mean Difference | P Value | ||
| HOA RMS | 0.13 ± 0.11 | < 0.01 | 0.19 ± 0.15 | < 0.01 | ||
| Spherical Aberration | 0.010 ± 0.078 | 0.44 | 0.12 ± 0.14 | < 0.01 | ||
| Coma | 0.13 ± 0.13 | < 0.01 | 0.14 ± 0.14 | < 0.01 | ||
| Trefoil | 0.015 ± 0.071 | 0.22 | 0.01 ± 0.081 | 0.74 | ||
SD = Standard deviation; D = Diopters; group 1 = small-incision lenticule extraction for myopia and myopic astigmatism ≤10 D; group 2 = small-incision lenticule extraction for myopia and myopic astigmatism > − 10 D; HOA RMS = root mean square of total higher-order aberration