Iritis is inflammation of the iris (the part of the eye that determines eye color), and sometimes also of the ciliary body, which is behind the iris. In this disorder, microscopic white cells from the inflamed area and excess protein that leaks from the small blood vessels inside the eye float in the fluid between the iris and the cornea. If there are a lot of floating cells, they may become attached to the back of the cornea or they may settle to the bottom of the area. The cause of iritis varies from person to person. Even when iritis is treated early, it often recurs. In most cases, however, it eventually disappears completely. When active, iritis should be treated.

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