Table 3.
Comparison of refractive outcomes of intraocular lens power calculation using the three devices in SRK/T formula
| Group A (n = 128) | Group B (n = 36) | ||||
|---|---|---|---|---|---|
| SS–OCT biometer | PCI | A–scan US | SS–OCT biometer | A–scan US | |
| Optimized constant | 118.02 | 118.04 | 117.90 | 118.02 | 117.90 |
| PE (D) | 0.00 ± 0.44 | 0.00 ± 0.46 | −0.02 ± 0.61 | 0.00 ± 0.47 | −0.01 ± 0.66 |
| MAE (D) | 0.36 ± 0.27† | 0.39 ± 0.30† | 0.47 ± 0.39 | 0.36 ± 0.31 | 0.64 ± 0.36 |
| p–value | 0.027* | p < .001‡ | |||
| MedAE (D) | 0.31 | 0.32 | 0.40 | 0.32 | 0.60 |
| Eye within (%) | |||||
| ≤ ±0.25 D | 41.44 | 42.97 | 36.72 | 47.22 | 22.22 |
| ≤ ±0.50 D | 71.09 | 67.19 | 60.16 | 72.22 | 47.22 |
| ≤ ±1.00 D | 95.31 | 95.31 | 90.63 | 94.44 | 83.33 |
Values are presented as mean ± standard deviation
Group A; PCI feasible, Group B; PCI unfeasible
D diopters, PE prediction error, MAE mean absolute error, MedAE median absolute error, SS-OCT swept-source optical coherence tomography, PCI partial coherence interferometry, US ultrasonography
*p–value is for Kruskal–Wallis test
†Same letters indicate no statistical significance based on Bonferroni’s method
††p–value is for Wilcoxon signed rank test