Horse Equine Recurrent Uveitis Management

Equine recurrent uveitis (ERU or moon blindness) is the leading cause of blindness in horses. Long-term management and surgical options preserve vision and welfare in affected horses.

Key Facts

ERU causes recurrent episodes of intraocular inflammation progressively destroying ocular structures
Leptospira infection, Onchocerca parasites and immune-mediated mechanisms are associated causes
Episodes cause acute eye pain with squinting, tearing, cloudiness and photophobia
Suprachoroidal cyclosporin implants significantly reduce episode frequency preserving vision long-term
Bilateral blindness significantly affects horse welfare but horses adapt remarkably with appropriate management

Welfare Considerations

ERU causes acute severe eye pain during episodes and cumulative loss of vision as inflammation recurs. Horses experiencing active uveitis episodes are in significant distress with obvious photophobia. Long-term management reducing episode frequency is essential welfare care. Blind horses require modified management including consistent stable layout and careful handling but many adapt well with appropriate support.

What You Can Do

Seek immediate veterinary assessment for any horse showing eye squinting, tearing or cloudiness
Implement anti-inflammatory treatment protocols during active episodes as directed by your vet
Discuss cyclosporin implant surgery with an equine ophthalmologist for horses with recurrent episodes
Manage blind horses with consistent environments and alert companions to prevent injury
Perform Leptospira vaccination where available in endemic regions to reduce infectious risk