Fig. 1

Comparison of fluorescein angiography and OCTA in posterior uveitis. Two eyes of two patients with chronic birdshot chorioretinopathy illustrate mild leakage on fluorescein angiography (a) that masks or blocks areas of reduced flow. OCTA more accurately highlights the zones of non-perfusion in the superficial retinal capillary plexus (b). Note the generalized reduction in blood flow velocity (highlighted in blue) that is evident in the color-coded OCTA map (c) that can also provide quantitative parameters. The areas of flow reduction on OCTA corresponds to a thinning of the retina on the OCT map (d) that has been described in the literature in advanced stages of birdshot