hemianopia
Pronunciation: hem-ee-ah-NO-pee-ah
Visual field defect involving loss of vision in half of the visual field, typically following stroke or brain injury.
Full Definition
Hemianopia is a visual field defect characterized by blindness or reduced vision in one half of the visual field in one or both eyes. Homonymous hemianopia, the most common type, affects the same side of the visual field in both eyes and typically results from damage to the optic tract, lateral geniculate nucleus, optic radiations, or primary visual cortex. This condition significantly impacts reading, navigation, and daily activities, requiring specialized rehabilitation approaches and adaptive strategies.
Usage
Usage note: Both 'hemianopia' and 'hemianopsia' are acceptable. Specify type (homonymous, heteronymous) when relevant.
In Context
- "Right homonymous hemianopia following left occipital stroke significantly impaired reading comprehension." — Vision therapy evaluation
- "Compensatory scanning training was initiated to address the patient's hemianopia-related mobility issues." — Occupational therapy treatment plan