Optic neuritis is inflammation of the optic nerve. It may cause sudden, reduced vision in the affected eye.
The cause of optic neuritis is unknown.
Sudden inflammation of the nerve connecting the eye and the brain (optic nerve) can injure the insulation (myelin sheath) surrounding each nerve fiber, causing the nerve to swell.
Causes of the inflammation can include:
Risk factors are related to the particular cause.
Germann CA, Baumann MR, Hamzavi S. Ophthalmic diagnoses in the ED: optic neuritis. Am J Emerg Med. 2007;25:834-837.
Johnston MV. Demyelinating Disorders of the CNS. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 18th Ed. Philadelphia, Pa: Saunders Elsevier; 2007: chap 600.
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