Normal sensory and absent cognitive electrophysiological responses in functional visual loss following chemical eye burn
2011
Abstract
A unique case of a 34-year-old patient with unilateral functional visual loss after chemical burn with normal visual evoked potentials (VEPs) and absent cognitive response (P300 wave) was presented. No abnormalities were found that could account for such a rapid monocular loss of vision with exception of absence of the P300 wave in the affected eye during cognitive tasks.
Vision slowly improved during 1 year without any treatment. Complex visual electrophysiological testing is the preferred tool for objective examination of such disorders.