What Is Equine Recurrent Uveitis?
Uveitis refers to inflammation of the uveal tract of the eye. The uveal tract consists of three components: the iris (colored portion of the eye responsible for opening and closing the pupil), the ciliary body (produces a watery fluid that maintains the shape of the eye) and the choroid (back portion of the eye responsible for supplying blood and nutrients). Equine recurrent uveitis is the term used for eye inflammation that recurs periodically. Equine recurrent uveitis occurs to varying degrees among horses and may affect one, or both eyes. After a horse is affected, ERU recurs at varying intervals, each time causing additional ocular damage that leads to permanent changes in the internal structures of the eye.