Figure 3

4D MIOCT increases suture placement accuracy in mock surgical trials.

A group of 14 surgeons-in-training were asked to perform corneal suture passes at two target depths with and without 4D MIOCT guidance during simulated surgery in cadaveric porcine eyes. (A) Representative B-scan located at the point of maximal needle depth. The needle, cornea and iris are labeled in orange, yellow and green, respectively. (B) Corresponding volumetric image. The B-scan (A) location is denoted by white rectangle. In this trial, the surgeon inserted the suture needle at a 44% corneal depth, 6% away from the 50% target depth. The cross-sectional view allowed accurate grading of the suture needle placement within corneal tissue. (C,D) Box plots summarizing suture placement with and without MIOCT guidance for 50% (C) and 90% (D) target depths, respectively. The data is plotted in percent difference from the target depth; closer to 0% difference is more accurate. At both target depths, the surgeons achieved increased suture placement accuracy with MIOCT.