1. Fundus photo of central retinal artery occlusion (CRAO).
Fundus photo of central retinal artery occlusion (CRAO). CRAO results in generalised retinal oedema, sparing the optic nerve, which is supported by a separate blood supply. Examination shows a ‘cherry red spot’ (arrow). The cherry red spot is an optical illusion. The macula is not more red; the oedema of the nerve fibres surrounding it colours it pallid, causing the macula, which has relatively less nerve fibres and therefore less tissue to swell, to appear relatively red.
John H Pula, and Carlen A Yuen Stroke Vasc Neurol 2017;2:
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