Table 2.
Longitudinal change in ocular biometry measured by IOL Master 700 in 231 eyes with with-the-rule astigmatism
| Parameter | Initial measurement |
Final measurement |
Difference (Final-Initial) |
p-value |
|---|---|---|---|---|
| Age (year) | 59.73 ± 14.26 | 61.67 ± 14.24 | 1.94 ± 0.79 | < 0.001a* |
| Sex (male/female) | 75 (32%) / 156 (68%) | |||
| Laterality (right/left) | 100 (43%) / 131 (57%) | |||
| AL (mm) | 25.02 ± 2.29 | 25.06 ± 2.33 | 0.05 ± 0.12 | < 0.001a* |
| Flat AK (D) | 43.48 ± 1.58 | 43.47 ± 1.59 | −0.02 ± 0.25 | 0.177a |
| Steep AK (D) | 44.54 ± 1.61 | 44.49 ± 1.62 | −0.04 ± 0.33 | 0.343b |
| Mean AK (D) | 44.01 ± 1.55 | 43.98 ± 1.56 | −0.03 ± 0.23 | 0.052b |
| Flat PK (D) | −5.73 ± 0.25 | −5.73 ± 0.25 | 0.00 ± 0.07 | 0.680b |
| Steep PK (D) | −6.12 ± 0.27 | −6.12 ± 0.28 | 0.01 ± 0.09 | 0.288a |
| Mean PK (D) | −5.93 ± 0.25 | −5.92 ± 0.25 | 0.00 ± 0.06 | 0.305a |
| Flat TK (D) | 43.55 ± 1.57 | 43.51 ± 1.58 | −0.04 ± 0.29 | 0.009a* |
| Steep TK (D) | 44.45 ± 1.59 | 44.43 ± 1.60 | −0.02 ± 0.34 | 0.379b |
| Mean TK (D) | 44.00 ± 1.54 | 43.97 ± 1.55 | −0.03 ± 0.25 | 0.068b |
| TK-AK (D) | −0.01 ± 0.11 | −0.01 ± 0.12 | 0.00 ± 0.06 | 0.786b |
| ACA (D) | 1.05 ± 0.74 | 1.03 ± 0.75 | −0.03 ± 0.36 | 0.238a |
| PCA (D) | −0.39 ± 0.13 | −0.38 ± 0.14 | 0.01 ± 0.10 | 0.169b |
| TCA (D) | 0.90 ± 0.72 | 0.92 ± 0.69 | 0.02 ± 0.39 | 0.280a |
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