Table 3.
Surgically induced changes in astigmatisms (SIA) calculated by vector analyses in delta-refractive astigmatisms (delta-RAs) and delta-corneal astigmatisms (delta-Kas), means of differences between the vectors of delta-RAs and delta-Kas, and 95% limits of agreement (LOA).
| SIA (D × degree) | J 0 [(delta-RA)–(delta-Ka)] | J 45 [(delta-RA)–(delta-Ka)] | |||
|---|---|---|---|---|---|
| Mean | 95% LOA∗ | Mean | 95% LOA∗ | ||
| Delta-RA | (0.58 ± 0.61 D) × 90.8 | na | na | na | na |
| Delta-simKa | |||||
| 1 mm | (0.74 ± 0.70) × 96.4 | 0.07 | −0.63 to 0.77 | 0.07 | −0.58 to 0.72 |
| 2 mm | (0.65 ± 0.64) × 96.8 | 0.03 | −0.51 to 0.56 | 0.07 | −0.44 to 0.58 |
| 3 mm | (0.46 ± 0.58) × 94.7 | −0.06 | −0.53 to 0.41 | 0.03 | −0.34 to 0.40 |
| 4 mm | (0.27 ± 0.55) × 92.8 | −0.16 | −0.70 to 0.39 | 0.005 | −0.37 to 0.38 |
| 5 mm | (0.08 ± 0.43) × 94.2 | −0.25 | −0.94 to 0.44 | −0.003 | −0.42 to 0.42 |
| 6 mm | (0.11 ± 0.40) × 0.42 | −0.34 | −1.32 to 0.63 | −0.01 | −0.58 to 0.56 |
| 7 mm | (0.19 ± 0.53) × 3.6 | −0.39 | −1.63 to 0.86 | −0.02 | −0.73 to 0.69 |
| 8 mm | (0.18 ± 0.68) × 8.1 | −0.38 | −1.74 to 0.98 | −0.03 | −0.83 to 0.76 |
| Delta-TNPa | |||||
| 1 mm | (0.80 ± 0.80) × 97.1 | 0.10 | −0.67 to 0.86 | 0.09 | −0.63 to 0.81 |
| 2 mm | (0.72 ± 0.71) × 96.8 | 0.06 | −0.53 to 0.65 | 0.08 | −0.50 to 0.65 |
| 3 mm | (0.52 ± 0.64) × 94.4 | −0.04 | −0.50 to 0.43 | 0.03 | −0.36 to 0.43 |
| 4 mm | (0.29 ± 0.60) × 92.7 | −0.15 | −0.70 to 0.40 | 0.005 | −0.39 to 0.40 |
| 5 mm | (0.08 ± 0.50) × 94.7 | −0.25 | −1.00 to 0.49 | −0.002 | −0.43 to 0.42 |
| 6 mm | (0.09 ± 0.42) × 176.7 | −0.33 | −1.32 to 0.65 | −0.003 | −0.59 to 0.58 |
| 7 mm | (0.19 ± 0.57) × 2.7 | −0.38 | −1.67 to 0.90 | −0.02 | −0.75 to 0.72 |
| 8 mm | (0.18 ± 0.76) × 10.5 | −0.37 | −1.80 to 1.06 | −0.04 | −0.89 to 0.81 |
| Delta-TCRPa | |||||
| 1 mm | (0.80 ± 0.79) × 97.0 | 0.10 | −0.65 to 0.85 | 0.09 | −0.63 to 0.80 |
| 2 mm | (0.78 ± 0.74) × 96.6 | 0.09 | −0.49 to 0.66 | 0.08 | −0.48 to 0.64 |
| 3 mm | (0.57 ± 0.65) × 94.8 | −0.008 | −0.46 to 0.45 | 0.04 | −0.35 to 0.43 |
| 4 mm | (0.36 ± 0.63) × 92.6 | −0.11 | −0.66 to 0.44 | 0.008 | −0.38 to 0.40 |
| 5 mm | (0.16 ± 0.50) × 94.9 | −0.21 | −0.90 to 0.47 | 0.005 | −0.40 to 0.41 |
| 6 mm | (0.06 ± 0.45) × 166.0 | −0.32 | −1.32 to 0.69 | 0.006 | −0.56 to 0.58 |
| 7 mm | (0.20 ± 0.64) × 179.7 | −0.39 | −1.76 to 0.98 | −0.007 | −0.78 to 0.76 |
| 8 mm | (0.19 ± 0.99) × 14.9 | −0.37 | −2.08 to 1.34 | −0.06 | −1.05 to 0.94 |
∗95% limits of agreement = mean difference ± 1.96 × standard deviation of the difference.
simK: simulated keratometry; TNP: true net power; TCRP: total corneal refractive power.