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What is the optic nerve?

You have one optic nerve in each eye, with each one about as thick as a pencil. These nerves connect your eyes to your brain, so they're critical for vision. When you see something with your eye, the optic nerve sends a picture of it to your brain. Your brain then interprets the image. Pressure on the optic nerve or damage to it can lead to vision problems or vision loss. Conditions that can cause pressure, inflammation, or damage on the optic nerve include glaucoma, complications of multiple sclerosis (MS), fibro-osseous lesions (bone overgrowth), head injuries, some uncommon genetic disorders (including dominant optic atrophy), and tumors.
optic nerve

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.