Equine recurrent uveitis (ERU) is the most common cause of blindness in horses worldwide, causing repeated episodes of painful eye inflammation that progressively destroy vision.
ERU causes intense ocular pain during acute episodes, which can last days to weeks. Between episodes, affected eyes may still experience chronic low-grade discomfort. The progressive loss of vision creates additional welfare concerns as horses become increasingly unable to navigate their environment safely, increasing anxiety and accident risk. Early intervention with appropriate anti-inflammatory treatment and surgical options where indicated is critical to preserving both vision and welfare.