Unexplained Progressive Visual Field Loss in the Presence of Normal Retinotopic Maps.

ABSTRACT: Lesions of primary visual cortex or its primary inputs typically result in retinotopically localized scotomas. Here we present an individual with unexplained visual field loss and deficits in visual perception in the absence of structural damage to the early visual pathway or lesions in visual cortex. The subject, monocular from an early age, underwent repeated perimetry tests over 8 years demonstrating severe anopia of the lower hemifield, and a clockwise progression of the loss through her upper left visual field. Her visual impairment was evident in a number of standardized tests and psychophysics, especially in tasks assessing spatial integration using illusory contours. However, her intellectual ability was intact and her performance in some other tasks assessing color vision or objec

SUBMITTER: Moutsiana C 

PROVIDER: S-EPMC6196317 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature