Equine recurrent uveitis—A review

Summary Equine recurrent uveitis (ERU) is still the leading cause of blindness in horses worldwide. It has a tremendous physical, emotional and economic impact on horses and their owners, respectively. This article will review the proposed aetiologies and discuss the complex and enigmatic relationship between ERU and leptospirosis as a cause. Typical clinical signs and ERU classifications will be discussed, and the current state of diagnostic testing evaluated. Much diagnostic data have been collected and published, and our thorough discussion of these results may serve to ease interpretation when routinely evaluating cases. Ultimately, the most current treatment options will be compared with regard to nonrecurrence rates, visual outcomes and associated complication rates.