(A) demonstrates an Early Treatment Diabetic Retinopathy Study circle overlay with a 1-mm inner diameter. The total membrane score is 5 (2 for each horizontal quadrant, 1 for the inferior quadrant, and 0 for the superior quadrant). In the optical coherence tomography angiography (OCTA) image, the foveal avascular zone (FAZ) is absent, totally vascularized (B). The FAZ change is also apparent in fundus angiography, seen as an oblique slit running toward the inferior-nasal macula (C). The spectral-domain OCT image cutting through the center of fovea shows loss of foveal pit with some thickening of the central fovea secondary to the epiretinal membrane (D). Note, the signal strength index of the OCTA image is 62 despite duplication of some retinal vessels.
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