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Definition Return to top
Optic neuritis is inflammation of the optic nerve. It may cause sudden, reduced vision in the affected eye.
Causes Return to top
The cause of optic neuritis is unknown.
Sudden inflammation of the nerve connecting the eye and the brain (optic nerve) can cause the nerve to swell and destroy its outer shell (myelin sheath). The inflammation may occasionally be due to a viral infection, or it may be caused by autoimmune diseases such as multiple sclerosis.
Risk factors are related to the possible causes.
Symptoms Return to top
Exams and Tests Return to top
A complete medical examination can help rule out related diseases. Tests may include the following:
Treatment Return to top
Vision often returns to normal within 2 - 3 weeks with no treatment.
Corticosteroids given through a vein (IV) may speed up recovery, but they can cause side effects.
Further tests may be needed to determine the cause of the neuritis. The condition causing the problem can then be treated.
Outlook (Prognosis) Return to top
Patients who have optic neuritis without a disease such as multiple sclerosis have a good chance of recovery. Optic neuritis caused by multiple sclerosis or other autoimmune diseases such as systemic lupus erythematosus has a poorer outlook.
Possible Complications Return to top
About 20% of patients with a first episode of optic neuritis will develop multiple sclerosis.
When to Contact a Medical Professional Return to top
Call your health care provider immediately if you have a sudden loss of vision in one eye.
If you have optic neuritis, call your health care provider if:
References Return to top
Germann CA, Baumann MR, Hamzavi S. Ophthalmic diagnoses in the ED: optic neuritis. Am J Emerg Med. 2007;25:834-837.Update Date: 10/6/2008 Updated by: Paul B. Griggs, MD, Department of Ophthalmology, Virginia Mason Medical Center, Seattle, WA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.