Clinical Study

Corneal Clarity and Visual Outcomes after Small-Incision Lenticule Extraction and Comparison to Femtosecond Laser-Assisted In Situ Keratomileusis

Table 3

FS-LASIK—preoperative versus 3-month postoperative corneal densitometry.

FS-LASIK
0–2 mm2–6 mmTotal (0–6 mm annulus)

Anterior (120 μm)Preop26.0 ± 1.7 (23.5 to 30.6)23.5 ± 1.7 (21.1 to 29.0)24.8 ± 1.7 (22.4 to 29.8)
3 months postop25.8 ± 1.7 (21.7 to 29.0)23.6 ± 1.7 (20.0 to 27.8)24.7 ± 1.6 (20.9 to 28.4)
value0.2360.4650.815

Central layerPreop15.9 ± 0.9 (14.5 to 17.7)14.7 ± 1.0 (13.0 to 16.9)15.3 ± 0.9 (13.8 to 17.1)
3 months postop15.7 ± 0.9 (13.9 to 18.0)14.6 ± 1.1 (12.8 to 17.4)15.2 ± 1.0 (13.5 to 17.7)
value0.0200.2220.059

Posterior (60 μm)Preop13.3 ± 0.9 (11.1 to 15.1)12.6 ± 1.0 (10.7 to 15.3)12.9 ± 0.9 (10.9 to 15.1)
3 months postop12.7 ± 0.9 (10.9 to 15.0)12.4 ± 1.0 (10.1 to 15.3)12.5 ± 0.9 (10.5 to 15.2)
value<0.0010.0450.001

Total (all layers)Preop18.4 ± 1.0 (16.6 to 20.4)16.9 ± 1.1 (15.3 to 19.7)17.7 ± 1.1 (16.0 to 20.1)
3 months postop18.0 ± 1.0 (15.9 to 20.2)16.8 ± 1.2 (14.6 to 19.4)17.4 ± 1.1 (15.4 to 19.8)
value0.0020.4170.033