Uveitis is a general term describing inflammation of the part of the eye called the uveal tract. This consists of the iris, ciliary body and choroid - although uveitis can additionally involve other parts of the eye. It can be caused by diseases or problems of the eye alone, or can be a part of conditions affecting other parts of the body. Uveitis is classified according to exactly where in the uvea it occurs, and symptoms also vary with the affected area. Treatment, often with pupil dilators and steroid eye drops, can usually reduce inflammation and ease symptoms. However, the treatment itself can cause complications. If treatment is not started promptly and/or complications occur, uveitis can lead to permanent loss of vision.