Table 3.
Longitudinal change in ocular biometry measured by IOL Master 700 in 147 eyes with against-the-rule astigmatism
| Parameter | Initial measurement |
Final measurement |
Difference (Final-Initial) |
p-value |
|---|---|---|---|---|
| Age (year) | 70.56 ± 10.05 | 72.51 ± 10.09 | 1.95 ± 0.86 | < 0.001a* |
| Sex (male/female) | 64 (44%) / 83 (56%) | - | - | |
| Laterality (right/left) | 76 (52%) / 71 (48%) | - | - | |
| AL (mm) | 24.08 ± 1.48 | 24.11 ± 1.48 | 0.02 ± 0.04 | < 0.001b* |
| Flat AK (D) | 43.20 ± 1.48 | 43.19 ± 1.49 | 0.00 ± 0.33 | 0.655a |
| Steep AK (D) | 44.15 ± 1.44 | 44.21 ± 1.44 | 0.06 ± 0.26 | 0.005b* |
| Mean AK (D) | 43.67 ± 1.43 | 43.70 ± 1.43 | 0.03 ± 0.25 | 0.148b |
| Flat PK (D) | −5.79 ± 0.22 | −5.79 ± 0.21 | 0.00 ± 0.08 | 0.685b |
| Steep PK (D) | −6.02 ± 0.24 | −6.02 ± 0.24 | 0.00 ± 0.08 | 0.874b |
| Mean PK (D) | −5.91 ± 0.22 | −5.91 ± 0.22 | 0.00 ± 0.06 | 0.875b |
| Flat TK (D) | 43.02 ± 1.48 | 43.02 ± 1.49 | 0.00 ± 0.37 | 0.904b |
| Steep TK (D) | 44.26 ± 1.45 | 44.32 ± 1.46 | 0.07 ± 0.29 | 0.005a* |
| Mean TK (D) | 43.64 ± 1.44 | 43.67 ± 1.44 | 0.03 ± 0.27 | 0.124b |
| TK-AK (D) | −0.03 ± 0.11 | −0.03 ± 0.10 | 0.00 ± 0.06 | 0.537a |
| ACA (D) | 0.95 ± 0.50 | 1.02 ± 0.59 | 0.06 ± 0.35 | 0.026b* |
| PCA (D) | −0.23 ± 0.11 | −0.23 ± 0.11 | 0.00 ± 0.10 | 0.651b |
| TCA (D) | 1.24 ± 0.53 | 1.30 ± 0.65 | 0.06 ± 0.38 | 0.054b |
Data are presented as mean ± standard deviation or as number (percent)
Statistically significant values (p < 0.05) are shown in asterisk (*)
a Wilcoxon signed rank test
b Paired t-test
AL axial length, AK anterior keratometry, D diopter, PK posterior keratometry, TK total keratometry, ACA anterior corneal astigmatism, PCA posterior corneal astigmatism, TCA total corneal astigmatism