Cortical Visual Impairment

Visual impairment is caused by damage to those parts of the brain related to vision. Although the eye is normal, the brain cannot properly process the information it receives. The degree of low vision may be mild or severe and can vary greatly, even daily. Also known as cerebral visual impairment, cortical visual impairment (CVI) may be temporary or permanent. People with cortical visual impairment have difficulty using what their eye sees. For example, they may have trouble recognizing faces, interpreting drawings, perceiving depth, or distinguishing between background and foreground. Children with cortical visual impairment can often see better when told in advance what to look for. Cortical visual impairment is also known as neurological visual impairment (NVI).

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