Equine Recurrent Uveitis: Managing Chronic Eye Pain
Equine recurrent uveitis (ERU) is the leading cause of blindness in horses worldwide, causing recurring painful eye inflammation that progressively damages vision.
Key Facts
- Affects approximately 2-25% of horses depending on region and breed
- Appaloosas are significantly predisposed with more severe disease
- Each uveitis episode causes progressive retinal and uveal damage leading to blindness
- Active inflammation causes significant pain detectable through behavioral and grimace assessment
- Management options include medical treatment, cyclosporine implants, and vitrectomy surgery
Welfare Considerations
ERU creates chronic welfare challenges through recurring bouts of acute pain during active inflammation alternating with progressive vision loss. Horses with active uveitis show behavioral pain indicators including blepharospasm, tearing, photophobia, and changed behavior. The chronic inflammatory damage progressively restricts vision, eventually causing complete blindness in affected eyes. Blind horses adapt remarkably well to their environment but require careful management changes to maintain welfare. Medical management focuses on controlling inflammation during flares. Surgical options, including cyclosporine implants, significantly reduce flare frequency in suitable candidates.
What You Can Do
- Seek immediate veterinary assessment for any signs of eye pain or inflammation
- Maintain appropriate medication during and between uveitis episodes
- Consider specialist referral to assess surgical treatment options
- Make management changes to support horses with reduced vision safely
- Monitor carefully for signs of a new uveitis episode and act promptly