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Purpose: To describe optical coherence tomography angiography (OCTA) findings in retinal vein occlusion and to analyze their correlation with visual functions. Methods: Fluorescein angiography, optical coherence tomography and OCTA (RTVue XR Avanti with AngioVue, Optovue, Fremont, CA, USA) were performed. Qualitative analysis of the imaging data was performed. Results: Twenty-one eyes from 20 patients were included. On OCTA, characteristic findings of the involved areas were noted in the superficial plexus and the deep plexus. In the superficial plexus, telangiectasias were found in 2 out of 21 eyes (9.5%) and capillary dropout in 9 (42.8%). In the deep plexus, telangiectasias were found in 13 (61.9%) eyes, and capillary dropout in 13 (61.9%). All composites were found to be more common in the deep plexus than in the superficial plexus. Eyes with capillary dropout in the superficial plexus, which indicates ischemia, showed lower visual acuity compared with those without capillary dropout (p = 0.049). Conclusions: We were able to demonstrate that OCTA could visualize telangiectasias and capillary dropout in each retinal capillary layer. In particular, capillary dropout in the superficial capillary plexus was associated with visual impairment.
