Transient, bilateral blurred vision, sometimes accompanied by flashing lights. Ataxia, vertigo, dysarthria or dysphagia, perioral numbness, and hemiparesis or hemisensory loss may accompany the visual symptoms. History of drop attacks (the patient suddenly falls to the ground without warning or loss of consciousness). Recurrent attacks are common.
May have a hemianopsia, ocular motility deficits, or nystagmus, but often presents with a normal ocular examination.
See DIFFERENTIAL DIAGNOSIS in 10.22, TRANSIENT VISUAL LOSS/AMAUROSIS FUGAX.