Fig. 3

Segmentation technique on OCT-angiography (OCTA) and measurements of flow area index and vessel density using the AngioVue software on OCTA. a and b Automated segmentation of the superficial and deep capillary plexuses using the Avanti spectral domain OCT (RTVue-XR Avanti; Optovue, Fremont, CA, USA). c and d Images depicting the measurements of flow area index and vessel density on OCTA