Intra-OP OCT: Using an intra-operative optical coherence tomography device for predicting the intraocular lens position

Since the introduction of optical biometry (IOLMaster, Carl Zeiss Meditec AG, Jena, Germany) as a reliable non-contact measurement of the axial eye length the influence of the error of axial length measurement on the refractive error decreased from over 50% (when measured with applanation ultrasound) to 36%. These results show that the estimation of the post-operative intra-ocular lens (IOL) position and therefore the estimated anterior chamber depth (ACD) is presently the main source of error (35% 3 to 42% 2) in IOL power calculation and therefore for the refractive outcome of the patients after cataract surgery. The aim of this study is to observe whether the number of successful intra-operative scans of the lens capsule position after cataract removal can be increased to a minimum of 98% and whether the refractive outcome could be improved by using both pre- and intra-operative measurements for IOL power calculations.