Comparison of the difference between baseline and 18 months between treated and untreated eyes for wave-front measurements
| Parameter | Treated eyes (μm) | Untreated eyes (μm) | Difference (μm) | p Value |
| Root mean square | −0.19 | +0.02 | −0.21 | 0.02 |
| Coma | −0.15 | +0.08 | −0.23 | 0.008 |
| Trefoil | −0.08 | −0.04 | −0.04 | 0.6 |
| Spherical aberration | −0.08 | −0.06 | −0.02 | 0.7 |
| Secondary astigmatism | −0.09 | −0.05 | −0.04 | 0.4 |
| Quatrefoil | −0.04 | −0.04 | 0 | 0.8 |
| Secondary coma | −0.04 | −0.01 | −0.03 | 0.1 |
| Secondary trefoil | −0.03 | −0.02 | −0.01 | 0.8 |
| Pentafoil | −0.02 | +0.02 | −0.04 | 0.03 |