Fig. 1: Vascular supply to the eye and clinical features in CRAO.

A The central retinal artery is a branch of the ophthalmic artery. In central retinal artery occlusion (green cross marks site of occlusion), the blood supply to the retina is interrupted. B Clinical fundus photograph of the right eye in a patient with acute CRAO showing disc oedema (D), retinal oedema (O) around the macula (M) result in a cherry-red appearance of the macula and arterial attenuation (white arrow). C FFA at 58 s showing delayed arterial perfusion (white arrow) D Patients with a cilioretinal artery have supplied to the macula stemming from the short posterior ciliary artery. Therefore, in CRAO (green cross), the macula is supplied. E Coloured fundus photograph, and F FFA showing the perfused macula (M) supplied by the cilioretinal artery (arrowhead) but there is oedema around the macula (O). CRAO central retinal artery occlusion. FFA fundus fluorescein angiography.