Comparison of 2 Biometers: Partial Coherence Biometer Versus New Swept Source OCT Biometer Related to Biometric Data
Purpose
To compare biometric readings in comparison between two different techniques in biometry.
Methods
Prospective study of 84 patients undergoing cataract surgery. All patients were measured preOP with the PCI Biometer (IOL-Master 500) and the full-eye swept source OCT Biometer (IOL-Master 700). Outliers were checked with the Fixation Check Feature.
Results
Relevant data for biometry as axial length, keratomtry and anterior chamber depth are correlating highly significant. 99.5 % of measurements with the two biometers can be predicted with high significance (ke Pearson = 0.995 – p=0.000). Comparing deviations of axis measurement difference are below 0.25 D.
Conclusion
The results of both biometers are comparable and correlate highly significant. Fixation Check reduce outliers. ULIB constants can be used on both biometers without the need of new optimization. These data are the basis for further measurements with the new swept source OCT to reduce errors for the predicted effective IOL position.