Table 4.
Higher-order aberrations before and after INTACS implantation.
| Parameter | Preoperative | Postoperative | P value | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 2 m | 1 yr | 3 yr | 5 yr | Pre to 2m | Pre to 1yr | Pre to 3 yr | Pre to five yr | ||
| Spherical aberration | −1.461 ±1.708 |
−1.743 ±0.737 |
−1.425 ±0.944 |
−1.440 ±0.771 |
−1.388 ±1.081 |
0.000* | 1.000 | 1.000 | 1.000 |
| Trefoil RMS | 0.416 ±0.235 |
0.661 ±0.457 |
0.656 ±0.421 |
0.845 ±0.425 |
0.753 ±0.548 |
0.267 | 1.000 | 0.726 | 0.141 |
| Coma RMS | 2.484 ±1.548 |
2.161 ±1.269 |
1.937 ±1.150 |
1.821 ±1.821 |
1.642 ±1.163 |
0.000* | 0.007* | 0.002* | 0.005* |
| HOA RMS | 14.541 ±1.664 |
15.344 ±1.275 |
14.365 ±1.112 |
13.474 ±1.052 |
12.448 ±1.044 |
0.357 | 0.268 | 0.248 | 0.071 |
RMS = Root mean square; HOA = Higher-order aberration. * indicates statistical significance.