Visual Restoration for Hemianopia

Inclusion Criteria: * Ages 21-75 years old * Ability and willingness to sign informed consent * Willingness to participate in both the training and evaluation sessions * MRI or CT scan demonstrating lesion in the occipital lobe of the brain and/or affecting white matter tracts that provide visual input to the occipital lobe of the brain * Brain injury due to ischemic or hemorrhagic causes that occurs after age 18 and at least 90 days prior to screening visit * At least two reliable HVF's demonstrating good fixation and a stable homonymous incomplete (e.g., quadrantanopia or relative defect) or complete hemianopia * Reliable HVFs with repeat HVFs if randomization takes place more than 4 weeks after screening visit * A homonymous, contiguous visual deficit measured by the 24-2 HVF to be a minimum of two testing locations high and two testing locations wide, where impaired locations are any that measure a threshold of less than 15 dB. * Demonstration of good fixation on visual training task - able to fixate the small targets presented as fixation letters reliably for 1000ms with jitter over less than 1 degree of visual angle in any direction away from target edge Exclusion Criteria: * Physical, neurological or mental disability that would interfere with study intervention * Concurrent participation in "vision therapy" other than standard occupational or physical therapy * Unreliable visual fields on prior testing, indicated by greater than 20% fixation losses, false positives, or false negatives. * Inability to discontinue medications judged to affect training and/or assessment (e.g., Ritalin, amphetamines, dopamines, or chemotherapeutic agents) * Physical condition likely to preclude completion of the clinical trial (e.g. end-stage or uncontrolled cancer, uncontrolled epilepsy, or end-stage heart disease) * Ocular or neurological condition that would interfere with training or assessment (e.g. damage to the optic nerves or lateral geniculate nucleus, any degenerative ocular condition) * Best corrected vision worse than 20/40 * Impaired foveal Humphrey sensitivity as indicated by the HVF tests. * Presence of vision loss resulting from ocular disease or disorder * Presence of bilateral visual acuity loss from any source * Inability to demonstrate fixation stability on eye movement monitored testing * Inability to follow training instructions