Uveitis is inflammation inside your eye. Inflammation usually happens when your immune system is fighting an infection. Sometimes uveitis means your immune system is fighting an eye infection — but it can also happen when your immune system attacks healthy tissue in your eyes. Uveitis can cause problems like pain, redness, and vision loss.
Uveitis damages the part of the eye called the uvea, but it often affects other parts of the eye, too. Sometimes uveitis goes away quickly, but it can come back. And sometimes it’s a chronic (long-term) condition. It can affect one eye or both eyes.
Uveitis can cause vision loss if it isn’t treated, so it’s important to see your eye doctor right away if you have symptoms.