This project is intended to collect data using standard clinical tests and psychophysics to quantify the effect of visual cortical damage on the structure of the residual visual system, visual perception, spatial awareness, and brain function. The investigators will also assess the effect of intensive visual retraining on the residual visual system, processing of visual information and the use of such information in real-world situations following damage. This research is intended to improve our understanding of the consequences of permanent visual system damage in humans, of methods that can be used to reverse visual loss, and of brain mechanisms by which visual recovery is achieved.
Between 21 and 80 years of age
Residents of the United States or Canada
Unilateral stroke or stroke-like damage to primary visual cortex or its immediate afferent white matter sustained within the specified age range (21-75 years)
Reliable visual field defects in both eyes as measured by Humphrey, MAIA, Goldmann, and/or equivalent perimetry, large enough to enclose a 5-deg diameter visual stimulus.
None