Clinical Study
Corneal Clarity and Visual Outcomes after Small-Incision Lenticule Extraction and Comparison to Femtosecond Laser-Assisted In Situ Keratomileusis
Table 2
SMILE—preoperative versus 3-month postoperative corneal densitometry.
| | SMILE | | 0–2 mm | 2–6 mm | Total (0–6 mm annulus) |
| | Anterior (120 μm) | Preop | 24.8 ± 1.6 (19.6 to 27.1) | 22.4 ± 1.7 (16.1 to 25.7) | 23.6 ± 1.6 (17.9 to 26.4) | | 3 months postop | 25.1 ± 1.8 (20.8 to 28.9) | 23.0 ± 1.8 (16.7 to 26.3) | 24.0 ± 1.8 (18.8 to 27.6) | | value | 0.105 | <0.001 | 0.003 |
| | Central layer | Preop | 15.4 ± 1.0 (12.3 to 17.2) | 14.1 ± 1.1 (10.2 to 16.6) | 14.8 ± 1.0 (11.3 to 16.9) | | 3 months postop | 15.6 ± 1.0 (13.2 to 17.4) | 14.2 ± 1.0 (10.5 to 15.8) | 14.9 ± 1.0 (11.9 to 16.5) | | value | 0.015 | 0.317 | 0.078 |
| | Posterior (60 μm) | Preop | 13.0 ± 1.0 (9.7 to 15.9) | 12.2 ± 1.1 (8.7 to 15.3) | 12.6 ± 1.1 (9.2 to 15.6) | | 3 months postop | 12.6 ± 0.9 (10.9 to 14.9) | 12.0 ± 1.0 (9.3 to 13.8) | 12.3 ± 0.9 (10.1 to 14.3) | | value | 0.001 | 0.264 | 0.012 |
| | Total (all layers) | Preop | 17.8 ± 1.1 (13.9 to 20.0) | 16.2 ± 1.2 (11.6 to 19.0) | 17.0 ± 1.2 (12.8 to 19.5) | | 3 months postop | 17.8 ± 1.1 (15.0 to 19.8) | 16.4 ± 1.2 (12.2 to 18.4) | 17.1 ± 1.1 (13.6 to 19.0) | | value | 0.877 | 0.073 | 0.259 |
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