This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Ophthalmology
[{'content': 'Blockade of Central Retinal Artery leads to temporary blindness is also known as: \nSelect and explain. \nA. Amaurosis fiigax, B. Gaze related amaurosis, C. Amblyopia ex anopsia, D. Amblyopia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) Amaurosis fugax > Amaurosis Fugax is transient ischemic attack of retina characterized by transient sudden loss of vision lasting for few minutes, due to occlusion by minute emboli. It may be a premonitory symptom of CRAO.> D/D of "cherry red" spot on fundus CRAO, blunt injury (Berhin\'s edema of macula), Tay-Sach\'s disease, Niemann-Pick disease, Sandboffs disease & quinine ambliopia.> Cattle-track appearance is other important feature of CRVO, apart from Hol/enhorst plauge.', 'role': 'assistant'}]