visibility of blood flow on optical coherencetomography angiography in a case of branch retinalartery occlusion

Purpose: we report the variability in flow angiogram during the course of branch retinal artery occlusion (brao) in a case imaged by optical coherence tomography angiography (octa). case report: octa was performed in a patient with brao at initial examination and 6 hours later. initially, the occluded retinal artery and its branches were not detected on octa whereas a slow perfusion was present on fluorescein angiography. six hours after initial examination, flow was detected on octa image in the previously occluded artery. conclusion: this case confirmed the relevance of using octa in monitoring brao and showed that capillaries with a very slow flow are not visible on octa angiograms. it emphasizes that non‑perfusion on octa should be interpreted with caution.