Return to work following unilateral enucleation in 34 horses (2000-2008).
Authors: Utter M E, Wotman K L, Covert K R
Journal: Equine veterinary journal
Summary
# Return to work following unilateral enucleation in horses Unilateral eye removal presents a significant clinical decision point for equine practitioners, yet evidence regarding post-operative performance outcomes has been sparse. Utter and colleagues conducted a retrospective case review of 34 horses that underwent unilateral enucleation at a major referral centre between 2000–2008, examining whether age at surgery, discipline, reason for removal, and which eye was enucleated influenced return to work. The findings were encouraging: 85% of horses (29/34) successfully returned to their previous disciplines, including competitive activities such as flat racing, hunter-jumpers, dressage and eventing, with no significant differences based on which eye was removed or the horse's age. Notably, horses experiencing acute vision loss had a higher return-to-work rate (88%) than those with gradual loss (78%), possibly reflecting better adaptation to sudden monocular vision, whilst among the five horses that did not return, four were retired due to owner or trainer concerns about performance decline rather than demonstrated functional deficits. These results suggest that unilateral enucleation alone should not be considered a career-ending diagnosis, allowing practitioners to counsel owners more optimistically and helping inform realistic rehabilitation expectations across a range of equine disciplines.
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Practical Takeaways
- •Unilateral enucleation should not be presented to owners as an automatic career-ending diagnosis; most horses successfully return to their previous work
- •Set realistic expectations that adaptation period varies, with acute vision loss cases showing slightly better return-to-work rates than gradual loss cases
- •Retirement decisions appear often based on owner perception rather than objective performance limitations—provide evidence-based counseling to prevent unnecessary loss of useful horses
Key Findings
- •85% (29/34) of horses returned to work following unilateral enucleation across multiple disciplines
- •88% (22/25) of horses with acute vision loss and 78% (7/9) with gradual vision loss returned to previous discipline
- •Only 12% (4/34) of horses failed to return to work due to anticipated performance/behavior concerns rather than physical inability
- •Return to work was successful across diverse equine disciplines including racing, jumping, dressage, and pleasure riding, with no significant difference between right and left eye enucleation