ABSTRACT
Stroke is a clinical syndrome dened by the World Health Organization as a rapidly developing focal neurological decit lasting longer than 24 hours or leading to death from a presumed vascular cause.1 In the special case of subarachnoid hemorrhage, this decit may be global. Strokes may be ischemic or hemorrhagic. If the focal symptoms resolve within an arbitrary cut-o of 24 hours, this is referred to as a transient ischemic attack (TIA).2 Amaurosis fugax is dened as transient monocular loss of vision lasting seconds to minutes attributable to ischemia or vascular insuciency of the retina and is usually grouped with TIA.3
