Inclusion Criteria:  Aged 18-80 Participant is willing and able to give informed consent for participation in the study Fluent English-speaking healthy adults Has suffered damage to the visual cortex at least 6 months before the study  Exclusion Criteria:  Previous eye disease or impairment other than hemianopia Neurological or psychiatric illness Contraindication to MRI Pregnant or breast feeding Second stroke during training  Data quality assurance (participant data will be removed from analysis for the following reasons):  Concurrent participation in other "vision therapy" Unreliable visual fields, indicated by greater than 20% fixation losses, false positives, or false negatives Inability to demonstrate fixation stability on eye movement monitored testing Failure to complete at least 100 training sessions over 6-months