Why is my horse's eye not opening normally after trauma? | arlo.® Atlas
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Overview
If your horse isn't opening an eye normally after trauma, it usually means the eye is sore, swollen or irritated. Common causes include a knock to the eyelids, a scratch to the surface of the eye or something trapped under the lid. Because eye problems can worsen quickly, it's worth taking this seriously and checking it promptly.
Things To Check
1. Check whether the eye is only partly closed, tightly shut, or blinking more than usual.
2. Look for swelling around the eyelids, obvious cuts, bruising or heat.
3. See whether there is tearing, discharge, cloudiness or an unusual colour to the eye.
4. Watch for rubbing, head shaking, sensitivity to light or obvious discomfort.
5. Check for any visible foreign body, such as dirt, bedding, grass seed or loose hair.
6. Notice whether the problem started straight after a kick, branch strike, rope rub or other impact.
7. Compare both eyes if you can, so you can judge whether the affected eye looks smaller, puffy or different in shape.
Common Causes
The most common reasons are a bruise or knock to the eyelids, a scratch on the eye surface, or irritation from dust, bedding or a small piece of debris.
Sometimes the eye stays half closed because the horse is trying to protect a painful area. Swelling around the eyelids can also make normal opening harder.
Less commonly, there may be a deeper eye injury or inflammation inside the eye. These can't be ruled out just by looking from a distance.
What To Do
Keep your horse in a calm, clean area and reduce anything that might make the eye more uncomfortable, such as dust, bright light or rubbing on fences and doors.
Do not try to force the eye open. If you can do so safely, gently note what you can see from the outside and monitor for any change in swelling, discharge or behaviour.
If the area around the eye has obvious dirt or loose debris, avoid rubbing it. The safest step is to keep the horse settled and arrange a vet check if the eye is still not opening normally, especially after a clear trauma.
When To Contact A Vet
Contact your vet promptly if the eye is closed, very painful, cloudy, bleeding, or if there is swelling, discharge or a visible wound. Eye injuries can change quickly, and it isn't safe to assume the problem is minor.
You should also seek veterinary advice if your horse is rubbing the eye, seems distressed, or the eye isn't improving within a short time after the trauma.
Related Questions
Why is my horse blinking or squinting one eye?
What should I do if my horse has something in its eye?
How do I tell if a horse eye injury is serious?
Atlas is here to support owners with practical, easy-to-understand guidance. It is not a substitute for professional veterinary advice. If you're concerned about your animal's health, symptoms worsen, or something doesn't feel right, contact your vet.