Pre- and 1 and 4–6 year postoperative results (±1 SD) in 30 study eyes
| Parameter | Preoperative | 12 months | 4–6 years | p Value* | p Value** |
|---|---|---|---|---|---|
| SEQ | −1.61±1.97D | −0.89±1.79D | −0.79±1.7D | <0.001 | 0.5 |
| Refractive cylinder | −3.39±2.5DC | −3.41±2.6DC | −3.11±2.4DC | 0.6 | 0.1 |
| UDVA (Snellen decimal equivalent) | 0.27±0.29 | 0.29±0.33 | 0..286±0.31 | 0.6 | 0.9 |
| CDVA (Snellen decimal equivalent) | 0.8±0.27 | 0.905±0.24 | 0.905±0.2 | <0.04 | 1.0 |
| Pachymetry | 488±34 μm | 483±35 μm | 491±35 μm | 0.5 | <0.04 |
| Mean Sim K | 46.44±3.4D | 46.18±3.38D | 45.6±3.3D | <0.001 | <0.001 |
| Corneal topographic astigmatism | 3.75±2.52D | 3.7±2.58D | 3.31±1.87D | 0.2 | 0.2 |
| Cone apex power | 51.69±4.63D | 51.29±4.27D | 50.53±4.58D | <0.001 | <0.02 |
*p Values at 4–6 years compared with preoperative values.
**p Values at 4–6 years compared with 1 year values.
DC, diopters cylinder; SEQ, spherical equivalent error; UVA, ultraviolet A.