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
Blockade of Central Retinal Artery leads to temporary blindness is also known as: 
Select and explain. 
A. Amaurosis fiigax, B. Gaze related amaurosis, C. Amblyopia ex anopsia, D. Amblyopia
A: Amaurosis fiigax
Answer: A: Amaurosis fiigax 
Explanation: (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.