Table 4.
Preoperative visual and refractive results in 21 matched eyes having SBK or thick-flap LASIK for moderate to high myopia (−4.0 to −10.0 D).
| Mean ± SD | |||
|---|---|---|---|
| Preoperative Data | SBK (89–119 µm) | Thick-Flap LASIK (144–199 µm) | P Value† |
| Age (y) | 39.81 ± 9.68 | 36.38 ± 7.83 | .045 |
| Sphere (D) | −6.19 ± 1.88 | −6.12 ± 1.79 | .782 |
| Cylinder (D) | −0.69 ± 0.52 | −0.63 ± 0.61 | .710 |
| SE (D) | −6.53 ± 1.87 | −6.43 ± 1.89 | .703 |
| BSCVA | .832 | ||
| LogMAR | 0.001± 0.07 | 0.005 ± 0.03 | |
| Snellen* | 20/20 | 20/20 | |
| Flap thickness (µm) | 108.57 ± 8.02 | 165.67 ± 12.58 | <.001 |
| Residual bed (µm) | 343.58 ± 27.03 | 337.23 ± 27.06 | .139 |
| Follow-up (mo) | 10.19 ± 6.09 | 12.29 ± 9.20 | .300 |
BSCVA = best spectacle-corrected visual acuity; LASIK = laser in situ keratomileusis; SBK = sub-Bowman keratomileusis; SE = spherical equivalent
*
Converted from -logMAR
†
Paired-samples t test