Study suggests bilateral enucleation can improve welfare in horses: full analysis

A newly published case series in Equine Veterinary Journal reports high owner satisfaction and owner-perceived welfare gains after bilateral enucleation in horses, a finding that could reshape how clinicians frame end-stage ocular pain cases. In 21 horses that underwent bilateral enucleation between 2016 and 2024, owners reported improvement in every welfare-related parameter assessed after surgery, and all said their horse’s quality of life improved. Median satisfaction with the procedure was 5 out of 5. (madbarn.com)

The paper addresses a particularly difficult clinical and emotional crossroads. Bilateral enucleation is usually considered only when ocular disease is chronic, painful, and no longer responsive to treatment, yet the idea of leaving a horse completely blind can push pet parents toward euthanasia instead. That tension is reflected in the study’s stated rationale: uncertainty about postoperative welfare and the emotional burden of the decision can make surgery feel less acceptable, even when pain relief is the primary goal. (madbarn.com)

Most horses in the series were older adults, with a mean age of 20.6 years, and the case mix was dominated by Appaloosas, which accounted for 62% of patients. Equine recurrent uveitis was the underlying diagnosis in 95% of cases. That fits the broader epidemiology: UC Davis notes that Appaloosas are particularly susceptible to ERU, especially bilateral disease, and that the condition has no cure. The same resource says ERU-affected horses with complications such as glaucoma or cataracts are more likely to become blind and require enucleation. (madbarn.com)

The study’s main takeaway is straightforward: owners perceived less pain and better day-to-day function after surgery. According to the abstract, most horses returned to previous activity levels, and owners also gave a high median score for recommending the procedure to others. Those findings align with current surgical guidance. The American College of Veterinary Surgeons says enucleation is used to improve comfort in horses with severe trauma or chronic painful ocular disease, and notes that for horses with chronic ocular pain, the procedure can significantly improve quality of life. (madbarn.com)

There wasn’t much direct outside commentary on this specific paper available at publication, but the broader specialist view appears consistent with its conclusions. ACVS describes enucleation as typically well tolerated in horses, while UC Davis notes that some horses ultimately require removal of one or both eyes for humane and medical reasons when advanced treatment can’t preserve comfort. In other words, the new study doesn’t overturn practice, but it does add owner-reported outcome data to support what many referral clinicians likely see in practice. (acvs.org)

Why it matters: For veterinary professionals, especially equine practitioners and ophthalmology referral teams, this paper may help reframe bilateral enucleation from a last-resort failure to a legitimate welfare intervention. In advanced ERU, the clinical question often shifts from vision preservation to pain relief. Having published data showing uniformly improved owner-perceived quality of life may make those conversations clearer, particularly for Appaloosa cases and other horses at risk of bilateral progression. It also reinforces the value of early referral, because UC Davis notes that early diagnosis and intervention are associated with the best prognosis, even though long-term prognosis remains guarded. (ceh.vetmed.ucdavis.edu)

The study also has important limits. It was retrospective, included only 21 horses, and depended on owner recall and subjective reporting rather than objective postoperative welfare measures. That means the results are encouraging, not definitive. Still, for a procedure that can be emotionally hard to discuss and easy to delay, even small datasets can be clinically useful if they help veterinarians and pet parents weigh pain, function, adaptation, and alternatives more realistically. (madbarn.com)

What to watch: The next step will be whether follow-up studies add prospective welfare assessments, behavioral metrics, or larger multicenter cohorts, which could help define which horses are the best candidates and how to counsel pet parents before vision is completely lost. (madbarn.com)