cortical visual impairment
Vision loss resulting from damage to visual cortex or visual processing areas while the eyes and optic nerves remain intact.
Full Definition
Cortical visual impairment (CVI) refers to decreased visual function resulting from injury or malformation of the visual cortex and associated visual processing areas. Unlike ocular causes of vision loss, the eyes and anterior visual pathways are structurally normal. CVI may result from hypoxic-ischemic encephalopathy, stroke, trauma, or developmental abnormalities. The condition can present with various symptoms including decreased visual acuity, visual field defects, difficulty with visual attention, or problems with visual-spatial processing. Diagnosis requires demonstrating normal pupillary responses and ophthalmoscopic examination in the presence of visual dysfunction. Treatment focuses on visual rehabilitation and environmental modifications to maximize functional vision.
Usage
Usage note: May be abbreviated as CVI; distinguish from cortical blindness, which implies more severe impairment.
In Context
- "The child's cortical visual impairment improved significantly with visual rehabilitation therapy." — Treatment outcome
- "Cortical visual impairment was suspected given the normal eye examination and pupillary responses." — Diagnostic consideration