LAUSR

We aimed to test for feasibility of volume‐rendered optical coherence tomography angiography (OCTA) as a novel method for assessing/quantifying retinal vasculature during ocular procedures and to explore the potential for intraoperative use. Thirty patients undergoing periocular anaesthesia were enrolled, since published evidence suggests a reduction in ocular blood flow. Retinal perfusion was monitored based on planar OCTA image‐derived data provided by a standard quantification algorithm and postprocessed/volume‐rendered OCTA data using a custom software script. Overall, imaging procedures were successful, yet imaging artifacts occurred frequently. In interventional eyes, perfusion parameters decreased during anaesthesia. Planar image‐derived and volume rendering‐derived parameters were correlated. No correlation was found between perfusion parameters and a motion artifact score developed for this study, yet all perfusion parameters correlated with signal strength as displayed by the device. Concluding, volume‐rendered OCTA allows for noninvasive three‐dimensional retinal vasculature assessment/quantification in challenging surgical settings and appears generally feasible for intraoperative use.