Dr.Pooja H. V. , V18542, Dr. Vijay Pai
Purpose- To compare optical biometry based on partial coherence laser interferometry(PCLI) principle to conventional ultrasound biometry in the accuracy of intraocular lens(IOL) power calculation.
Materials and Methods- In this comparative study, 100 patients undergoing phacoemulsification cataract surgery, 50 of them underwent optical biometry and 50 conventional applanation ultrasound biometry. Eyes were grouped according to axial length; short(<22mm), normal(22 to <24.50) and long(>24.50).The mean error and mean absolute error(MAE) were calculated and compared using paired t- tests.
Results- The MAE corresponded to 0.60 +/- 0.40D and 0.20+/- 0.30D with applanation ultrasound and that due to optical biometry using PCLI principle respectively. The optical biometry is found to give more accurate values for eyeball with small and large axial length.
Conclusion- The non contact optical biometry using the partial coherence laser interferometry (PCLI) principle is a more reliable and accurate method in IOL power calculation.