Table 1 Preoperative and Intra-Operative Parameters
Mean ± SD | Range | |
|---|---|---|
Preoperative variables | ||
Sphere (D) | −10.33 ± 0.82 | − 8.75 to − 12.50 |
Cylinder (D) | −1.20 ± 0.87 | 0.00 to − 4.25 |
Spherical equivalent (D) | −11.02 ± 0.81 | −10.00 to − 13.50 |
Central corneal thickness (μm) | 580.3 ± 25.9 | 519 to 656 |
Pupil diameter (mm) | 6.9 ± 0.9 | 4.4 to 8.6 |
Minimum keratometry (D) | 43.5 ± 1.8 | 39.6 to 49.0 |
Maximum keratometry (D) | 44.8 ± 1.7 | 41.3 to 50.2 |
Intra-operative variables | ||
Average flap thickness (μm) | 117.2 ± 21.3 | 90.0 to 141.4 |
Average ablation (μm) | 137.7 ± 10.8 | 115.6 to 164.1 |
Average % of cornea ablated | 42.6 ± 2.4 | 38.4 to 47.7 |
Residual stromal bed (μm) | 314.3 ± 62.3 | 280.0 to 381.5 |
Optical zone (mm) | 6.5 ± 0.1 | 6.0 to 6.5 |