Table 2

Pre- and 1 and 4–6 year postoperative results (±1 SD) in 30 study eyes

ParameterPre-operative12 months4–6 yearsp Value*p Value**
Root mean square2.45±1.22 μm2.45±1.13 μm2.19±1.08 μm<0.001<0.001
Coma2.09±1.23 μm2.12±1.21 μm1.82±1.13 μm<0.001<0.001
Trefoil0.78±0.4 μm0.79±0.33 μm0.81±0.33 μm0.71.0
Spherical aberration0.2±0.45 μm0.18±0.44 μm0.21±0.37 μm0.30.4
Secondary astigmatism0.59±0.35 μm0.51±0.28 μm0.46±0.26 μm<0.002<0.02
Quatrefoil0.21±0.11 μm0.22±0.13 μm0.21±0.11 μm0.81.0
Secondary coma0.27±0.2 μm0.26±0.2 μm0.24±0.16 μm0.10.4
Secondary trefoil0.15±0.1 μm0.13±0.1 μm0.14±0.09 μm0.31.0
Pentafoil0.08±0.05 μm0.07±0.05 μm0.07±0.04 μm<0.050.6
  • *p Values at 4–6 years compared with preoperative values.

  • **p Values at 4–6 years compared with 1 year values.