What is optic neuritis?
Optic neuritis is a condition where the optic nerve becomes inflamed. This nerve carries visual information from your eyes to your brain, so when it’s irritated, your vision can be affected.
The condition often develops quickly and may involve one or both eyes. It can cause temporary changes in vision and discomfort, but many people recover over time.
In many cases, the exact cause isn’t known. However, optic neuritis is often linked to immune system activity.
Possible causes and risk factors:
- Autoimmune conditions such as multiple sclerosis (MS)
- Neuromyelitis optica (a condition affecting the brain and spinal cord)
- Viral infections that trigger inflammation
- The immune system mistakenly attacks the optic nerve
Symptoms
Optic neuritis can affect people in different ways. Symptoms may come on suddenly and vary in severity.
Common symptoms include:
- Vision loss in one eye
- Blurry or dim vision
- Pain behind the eye, especially with movement
- Colors appearing faded or less vivid
- Trouble seeing clearly after exercise or heat exposure
How is it diagnosed?
Your healthcare provider will start with a detailed eye exam and a review of your symptoms. They may check how well you see, how your pupils react to light, and how you perceive colors.
Additional tests may include imaging, such as an MRI, to look at the optic nerve and brain. In some cases, blood tests or other evaluations are used to look for underlying conditions.
How is it treated?
In some cases of optic neuritis, symptoms improve on their own without treatment. Your care team may closely monitor your symptoms as your vision improves.
If treatment is needed, options may include:
- Corticosteroids (IV medications): Help reduce inflammation and may speed recovery
- Treatment for underlying conditions, Such as MS or other autoimmune disorders
Most people begin to see improvement within a few weeks, with continued recovery over one to three months. While many regain most of their vision, some may notice lasting changes.
