Statistical Learning as a Novel Intervention for Cortical Blindness

Cortically Blind participants Inclusion criteria: * Between 21 and 75 years of age * Residents of the United States or Canada * Have successfully completed previous enrollment in Dr. Huxlin study (IRB #5966 or #75) * Exhibit unilateral stroke or stroke-like damage to primary visual cortex or its immediate afferent white matter sustained within the specified age range of 21 - 75 years (verified by MRI and/or CT scans) * Reliable visual field defects in both eyes (homonymous defects) as measured by Humphrey visual fields. This deficit must be large enough to enclose a 5-deg diameter visual stimulus. * Able to fixate on visual targets reliably for 1000ms within 1-deg of visual angle. * Willing, able, and competent to provide their own informed consent * Normal cognitive abilities and be able to understand written and oral instructions in English Exclusion criteria: * Past or present ocular disease interfering with visual acuity * Best corrected visual acuity (BCVA) worse than 20/40 in either eye * Sustained documented or suspected damage to the dorsal Lateral Geniculate Nucleus * Presence of diffuse whole brain degenerative processes * History of traumatic brain injury * Any other brain damage deemed by study staff to potentially interfere with training ability or outcome measures * Documented history of drug/alcohol abuse * Currently taking neuroactive medications which would impact training, as determined by PI * Cognitive or seizure disorders * One-sided attentional negle…