![]() This is because the meninges, thin tissue layers that surround the brain and spinal cord, also surround the optic nerve. Hydrocephalus can damage the optic nerve when intracranial pressure (ICP) increases. This causes changes in how a person sees. If the optic nerve is damaged, the information from the eye cannot reach the brain or may be incomplete. Visual information is transmitted to the brain by the optic nerve, a bundle of fibers that run from the eye to the brain. Hydrocephalus can affect vision in two different ways: 1) Damage to Optic Nerve, 2) Damage to Nerves that Control the Eye Muscles. This is often used as a sign of hydrocephalus (see below: Sunsetting Sign).
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