Predicting IOL Power Using Partial Coherence Interferometry Versus Intraoperative Refractive Biometry
Purpose
To compare intraoperative refractive (IRB) vs. IOL master (IOLM) biometry for IOL power calculation.
Methods
10 virgin and 16 post-LASIK eyes underwent phakic (IOL Master with SRKT & Haigis-L) and aphakic (IRB with ORA) biometry. Accuracy of predicted IOL power by both methods was compared using t-test.
Results
In all post-LASIK eyes (10/10), IRB predicted different IOL powers from IOLM predicted values (avg +/- 0.75D (p<0.01)). In virgin eyes, IOLM and IRB predicted similar powers 69% (11/16) of the time (p>0.05). All but one eye (25/26) with IOLs implanted based on IRB were within +/- 0.5D of goal refraction postoperatively at one month.
Conclusion
IRB/ORA predicted IOL power more accurately than IOLM on post-LASIK eyes, but was not statistically significant on virgin eyes.