A young patient presented with sudden painless loss of vision with systolic murmur over chest, ocular examination reveals – cherry red spot in macula with clear AC, with perception of light, diagnosis –
Amongst the given options CRVO, CRAO and central serous retinopathy can cause sudden painless loss of vision. However following features favour the diagnosis of CRAO :-


Cherry red spot
Systolic murmur (suggests cardiac lesion which may be the source of emboli)
Central retinal artery occlusion
Central retinal vein occlusion
Macular choroiditis with infective endocarditis
Central serous retinopathy