Uveitis refers generally to a range of conditions that cause inflammation of the middle layer of the eye, the uvea, and surrounding tissues. The uvea consists of the middle layer of pigmented vascular structures of the eye and includes the iris, ciliary body, and choroid. It can be painful and the eye generally turns red, and occasionally vision may be cloudy. The term uveitis is not only used to refer to an inflammation of the uvea, but to any part of the inside of the eye. It is not a single disease and has different causes. These diseases can slightly reduce vision or may well lead to severe vision loss. It can happen at all ages and primarily affects people between 20 ñ 60 years old. Uveitis can last for a short (acute) or a long (chronic) time.