Table 4. Linear regression analysis showing changes in asphericity for 8-mm corneal diameter (Corneal Wavefront).
| SE (D) | AZ (mm) | |||||
|---|---|---|---|---|---|---|
| 7 | 7.2 | 7.4 | 7.6 | 7.8 | 8 | |
| -9.00 | 3.12 | 3.07 | 3.01 | 2.96 | 2.91 | 2.85 |
| -8.00 | 2.48 | 2.42 | 2.37 | 2.32 | 2.26 | 2.21 |
| -7.00 | 1.84 | 1.78 | 1.72 | 1.67 | 1.62 | 1.56 |
| -6.00 | 1.19 | 1.13 | 1.08 | 1.03 | 0.97 | 0.92 |
| -5.00 | 0.54 | 0.49 | 0.43 | 0.38 | 0.33 | 0.27 |
SE = spherical equivalent; AZ = ablation zone.
Depending on the magnitude of preoperative spherical equivalent aimed to be corrected and the value of the treatment ablation volume.