Table 4.
Refraction Astigmatism Prediction Error
| PPCA | Preoperative MPCA | Postoperative MPCA | |
|---|---|---|---|
| MRA-PE (D) ± SD | 0.50 ± 0.36 | 0.55 ± 0.44 | 0.54 ± 0.49 |
| tr-Centroid Error (D @ degrees) | 0.16 @ 99 | 0.21 @ 89 | 0.24 @ 91 |
| % of eyes within vector prediction error magnitude | |||
| ≤0.25 | 21% | 22% | 21% |
| ≤0.50 | 60% | 60% | 54% |
| ≤0.75 | 81% | 81% | 79% |
| ≤1.00 | 94% | 94% | 91% |
Abbreviations: MRA-PE, Mean refractive astigmatism prediction error; tr-Centroid Error, Trimmed refractive astigmatism prediction error; PPCA, Predicted posterior corneal astigmatism; MPCA, Measured posterior corneal astigmatism.