Optic neuritis
Retro-bulbar neuritis; Multiple sclerosis - optic neuritis; Optic nerve - optic neuritisThe optic nerve carries images of what the eye sees to the brain. When this nerve become swollen or inflamed, it is called optic neuritis. It may cause sudden, reduced vision in the affected eye.
Causes
The exact cause of optic neuritis is unknown.
The optic nerve carries visual information from your eye to the brain. The nerve can swell when it becomes inflamed. The swelling can damage nerve fibers. This can cause short or long-term loss of vision.
Conditions that have been linked with optic neuritis include:
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Autoimmune diseases, including lupus, sarcoidosis, and Behçet disease
Autoimmune diseases
An autoimmune disorder occurs when the body's immune system attacks and destroys healthy body tissue by mistake. There are more than 80 autoimmune d...
Read Article Now Book Mark ArticleLupus
Systemic lupus erythematosus (SLE) is an autoimmune disease. In this disease, the immune system of the body mistakenly attacks healthy tissue. It c...
Read Article Now Book Mark ArticleSarcoidosis
Sarcoidosis is a disease in which inflammation occurs in the lymph nodes, lungs, liver, eyes, skin, and/or other tissues.
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Cryptococcosis, a fungal infection
Cryptococcosis
Cryptococcosis is infection with the fungi Cryptococcus neoformans or Cryptococcus gattii.
Read Article Now Book Mark Article - Bacterial infections, including tuberculosis, syphilis, Lyme disease, and meningitis
Lyme disease
Lyme disease is a bacterial infection that is spread through the bite of one of several types of ticks.
Read Article Now Book Mark ArticleMeningitis
Meningitis is an infection of the membranes covering the brain and spinal cord. This covering is called the meninges.
Read Article Now Book Mark Article - Viral infections, including viral encephalitis, measles, rubella, chickenpox, herpes zoster, mumps, and mononucleosis
Encephalitis
Encephalitis is irritation and swelling (inflammation) of the brain, most often due to infections.
Read Article Now Book Mark ArticleMeasles
Measles is a very contagious (easily spread) illness caused by a virus.
Read Article Now Book Mark ArticleRubella
Rubella, also known as the German measles, is an infection in which there is a rash on the skin. Congenital rubella is when a pregnant woman with rub...
Read Article Now Book Mark ArticleChickenpox
Chickenpox is a viral infection in which a person develops very itchy blisters all over the body. It was more common in the past. The illness is ra...
Read Article Now Book Mark ArticleHerpes zoster
Shingles is a painful, blistering skin rash. It is caused by the varicella-zoster virus, a member of the herpes family of viruses. This is the viru...
Read Article Now Book Mark ArticleMumps
Mumps is a contagious disease that leads to painful swelling of the salivary glands. The salivary glands produce saliva, a liquid that moistens food...
Read Article Now Book Mark Article - Respiratory infections, including mycoplasma pneumonia and other common upper respiratory tract infections
Mycoplasma pneumonia
Pneumonia is inflamed or swollen lung tissue due to infection with a germ. Mycoplasma pneumonia is caused by the bacteria Mycoplasma pneumoniae (M pn...
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Multiple sclerosis
Multiple sclerosis
Multiple sclerosis (MS) is an autoimmune disease that affects the brain and spinal cord (central nervous system).
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Symptoms
Symptoms may include:
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Loss of vision in one eye over an hour or a few hours
Loss of vision
Blindness is a lack of vision. It may also refer to a loss of vision that cannot be corrected with glasses or contact lenses. Partial blindness mean...
Read Article Now Book Mark Article - Changes in the way the pupil reacts to bright light
- Loss of color vision
- Pain when you move your eye
Exams and Tests
A complete medical exam can help rule out related diseases. Tests may include:
- Color vision testing
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MRI of the brain, including special images of the optic nerve
MRI of the brain
A head MRI (magnetic resonance imaging) is an imaging test that uses powerful magnets and radio waves to create pictures of the brain and surrounding...
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Visual acuity testing
Visual acuity testing
The visual acuity test is used to determine the smallest letters you can read on a standardized chart (Snellen chart) or a card held 20 feet (6 meter...
Read Article Now Book Mark Article - Visual field testing
- Examination of the optic disc using indirect ophthalmoscopy
Ophthalmoscopy
Ophthalmoscopy is an examination of the back part of the eye (fundus), which includes the retina, optic disc, choroid, and blood vessels.
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Treatment
Vision often returns to normal within 2 to 3 weeks with no treatment.
Corticosteroids given through a vein (IV) or taken by mouth (oral) may speed up recovery. However, the final vision is no better with steroids than without. Oral steroids may actually increase the chance of recurrence.
If tests suggest that there is also multiple sclerosis, other types of treatment may be helpful.
Further tests may be needed to try to find the cause of the neuritis. If there is a condition causing the problem, it may be able to be treated.
Outlook (Prognosis)
When optic neuritis occurs without other diseases, there is a better prognosis. An MRI is an important test because it can help predict if multiple sclerosis or other similar autoimmune diseases are present or may develop.
Optic neuritis caused by multiple sclerosis or other autoimmune diseases has a poorer outlook. However, vision in the affected eye may still return to normal.
Possible Complications
Complications may include:
- Body-wide side effects from corticosteroids
- Vision loss
Some people who have an episode of optic neuritis will develop nerve problems in other places in the body or develop multiple sclerosis.
When to Contact a Medical Professional
Contact your health care provider right away if you have a sudden loss of vision in one eye, especially if you have eye pain.
If you have been diagnosed with optic neuritis, contact your provider if:
- Your vision decreases.
- The pain in the eye gets worse.
Pain in the eye
Pain in the eye may be described as a burning, throbbing, aching, or stabbing sensation in or around the eye. It may also feel like you have a forei...
Read Article Now Book Mark Article - Your symptoms do not improve within 2 to 3 weeks.
References
Bennett JL. Optic neuritis. Continuum (Minneap Minn). 2019;25(5):1236-1264. PMID: 31584536 pubmed.ncbi.nlm.nih.gov/31584536/.
Calabresi PA. Multiple sclerosis and demyelinating conditions of the central nervous system. In: Goldman L, Cooney KA, eds. Goldman-Cecil Medicine. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 380.
Filipi M, Jack S. Interferons in the treatment of multiple sclerosis: a clinical efficacy, safety, and tolerability update. Int JMS Care. 2020;22(4):165-172. PMID: 32863784 pubmed.ncbi.nlm.nih.gov/32863784/.
Moss HE, Balcer LJ. Inflammatory optic neuropathies and neuroretinitis. In: Yanoff M, Duker JS, eds. Ophthalmology. 6th ed. Philadelphia, PA: Elsevier; 2023:chap 9.7.
Thurtell MJ, Prasad S, Tomsak RL. Neuro-ophthalmology: afferent visual system. In: Jankovic J, Mazziotta JC, Pomeroy SL, Newman NJ, eds. Bradley and Daroff's Neurology in Clinical Practice. 8th ed. Philadelphia, PA: Elsevier; 2022:chap 16.
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External and internal eye anatomy - illustration
The cornea allows light to enter the eye. As light passes through the eye the iris changes shape by expanding and letting more light through or constricting and letting less light through to change pupil size. The lens then changes shape to allow the accurate focusing of light on the retina. Light excites photoreceptors that eventually, through a chemical process, transmit nerve signals through the optic nerve to the brain. The brain processes these nerve impulses into sight.
External and internal eye anatomy
illustration
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External and internal eye anatomy - illustration
The cornea allows light to enter the eye. As light passes through the eye the iris changes shape by expanding and letting more light through or constricting and letting less light through to change pupil size. The lens then changes shape to allow the accurate focusing of light on the retina. Light excites photoreceptors that eventually, through a chemical process, transmit nerve signals through the optic nerve to the brain. The brain processes these nerve impulses into sight.
External and internal eye anatomy
illustration
Review Date: 1/29/2024
Reviewed By: Audrey Tai, DO, MS, Athena Eye Care, Mission Viejo, CA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.