Transient painless visual loss caused by either circulatory, ocular or a neurologic condition. Vision loss can last a few seconds to minutes.<unk>  is greek for "fleeing"
Greatest suspicion in assessing these patients should be to evaluation for acute stroke and embolic phenomenon as that will carry the greatest mortality
Amaurosis fugax
Causes are divided into embolic, hemodynamic, ocular, neurologic, and idiopathic [3]
Pellagra
Carotid emboli or Cardiac emboli in origin causing
Traumatic mydriasis
Central Retinal Artery Occlusion 
Proctalgia fugax
Central Retinal Vein Occlusion 