Optic Nerve - GCSE Biology Definition

The optic nerve is a crucial part of the eye that connects it to the brain. It carries electrical impulses from the retina to the brain, where they are processed into images. When light enters the eye, it is detected by photoreceptor cells in the retina, which convert the light into electrical signals. The optic nerve then transmits these signals to the brain so we can see. Damage to the optic nerve can affect vision because it prevents visual information from reaching the brain.