Horse Recurrent Uveitis: Welfare and Management

Equine recurrent uveitis (ERU) is the leading cause of blindness in horses, causing recurring painful eye inflammation that severely impacts welfare.

Key Facts

ERU causes repeated bouts of painful intraocular inflammation leading to progressive vision loss
Appaloosas, warmbloods, and draft breeds have higher genetic predisposition
Bacterial triggers (Leptospira) and immune dysregulation both contribute to ERU
Each flare causes cumulative damage: cataracts, retinal detachment, and eventual blindness
Cyclosporine implants can reduce flare frequency by immunosuppression at the source
Bilateral blindness occurs in 25-40% of affected horses without aggressive management

Welfare Considerations

ERU causes intense ocular pain during flares - blepharospasm, photophobia, and tearing are clear indicators of suffering. Between flares, chronic discomfort may persist. Progressive vision loss profoundly affects equine wellbeing - blind horses face anxiety in unfamiliar environments, increased accident risk, and significant management challenges. Early aggressive treatment is essential to preserve vision and quality of life.

What You Can Do

Seek immediate veterinary care for any signs of eye pain or cloudiness in horses
Discuss cyclosporine implant surgery with a veterinary ophthalmologist for affected horses
Use UV-protective fly masks to reduce light-triggered inflammation
Test horses with ERU for Leptospira infection as a triggering factor
Provide stable environments and consistent routines for horses with vision loss
Evaluate quality of life regularly - some blind horses adapt well with careful management