People can get one or more of the cerebral visual impairments (CVIs) at any age.

The CVIs have many causes including:

In babies and young infants:

• atypical brain development in the womb (for example due to a rare genetic disorder or infection)
• a period of poor oxygen or sugar supply

And in anyone else, at any age (including young children), who develops injury or change to the brain parts that deal with vision, including:

• severe head injury
• a stroke or bleeding into the brain
• progressive brain conditions like dementia
• infections including meningitis and encephalitis
• tumours

Sources