It is an inflammation of the uvea, the middle layer of the eye that includes the iris, the ciliary body, and the choroid. It can appear suddenly and affect one or both eyes, causing redness, eye pain, light sensitivity, and blurred vision.

Uveitis may be associated with infections, trauma, or autoimmune diseases. Its severity and duration vary, and in more serious cases it can damage internal structures of the eye, putting vision at risk if not treated promptly.