Figure 13

OCTA of BRAO and CRAO. (A) The right eye of a 70 year old Caucasian man with an acute branch retinal artery occlusion using the Angiovue optical coherence tomography angiography (OCTA) software of the RTVue XR Avanti (Optovue, Inc., Fremont, CA). (A1) Full-thickness (internal limiting membrane to Bruch’s membrane) 4.5 x 4.5 mm OCT angiogram of the optic disc showing decreased capillary perfusion superotemporal and nasal to the disc (yellow arrows). (A2) 4.5 x 4.5 mm en-face OCT thickness map showing retinal thickening in red and thinning in blue (yellow arrows) that correspond to the decreased capillary perfusion in A1. (A3) Full-thickness 6 x 6 mm OCT angiogram illustrating decreased capillary perfusion superotemporal and nasal to the disc (yellow arrow) as in A1. (A4) 6 x 6 mm en-face OCT thickness map showing retinal thickening in red (yellow arrow) that correspond to the decreased capillary perfusion in A3. (B) The right eye of an 81 year old Caucasian man with a subacute central retinal artery occlusion using the Angiovue optical coherence tomography angiography (OCTA) software of the RTVue XR Avanti (Optovue, Inc., Fremont, CA). (B1) Full-thickness 4.5 x 4.5 mm OCT angiogram of the optic disc showing diffusely decreased peripapillary capillary perfusion. (B2) Full-thickness 6 x 6 mm OCT angiogram illustrating decreased capillary perfusion in the macula. Only the large retinal and peripapillary vessels demonstrate blood flow. (B3) Fluorescein angiography is hypo-fluorescent in the macula and peripapillary region due to the decreased ability for the fluorescein dye to reach these areas because of low blood flow. The vessels appear attenuated. (B4) Red-free fundus photo demonstrates attenuation of the vessels especially in the macular and peripapillary regions.