<prompt> Blockade of Central Retinal Artery leads to temporary blindness is also known as:Amaurosis fiigaxGaze related amaurosisAmblyopia ex anopsiaAmblyopia  <response>: 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. DD of cherry red spot on fundus CRAO, blunt injury Berhins edema of macula, Tay-Sachs disease, Niemann-Pick disease, Sandboffs disease quinine ambliopia. Cattle-track appearance is other important feature of CRVO, apart from Holenhorst plauge. 