Optic neuritis is an inflammation of the eye's optic nerve. It is thought to be an autoimmune disorder, in which body's immune system mistakenly attacks optic nerve tissue, causing swelling and impaired function of the optic nerve.
In order for you to see, the optic nerve carries nerve impulses from the eye to the brain, where they are interpreted as images. Damage or infection of the optic nerve can significantly affect vision.
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