One of the more common, but often underestimated, eye problems is corneal defects in horses. Horse owners know how important it is to look after their animals' eye health. In this article, we aim to give you an overview of corneal injuries in horses. Learn more about the causes, symptoms, and most importantly, how you can help your horse.
Hornhautdefekte bei Pferden sind beschädigte oder abgenutzte Stellen auf der Hornhaut des Auges.
The cornea is the outer, transparent layer of a horse's eye and plays a vital role in vision as it refracts incoming light and focuses it onto the retina. A corneal defect, also referred to as a corneal injury or disease, occurs when this protective layer is compromised due to trauma or inflammation. This can result in pain, vision impairment, and in severe cases, even permanent damage.
Causes of corneal defects in horses
Corneal defects in horses can have various causes, including:
- Foreign body injuriesHorses, due to their natural way of life, are often in contact with dirt, dust and other foreign bodies which can irritate or even injure the eye. Small particles such as dust, sand or grass can injure the cornea and lead to inflammation.
- InfectionsBacterial, viral or fungal infections are a common cause of keratitis. Bacterial infections are particularly dangerous, as they can lead to severe corneal ulcers.
- Comorbidity of ERU (Equine Recurrent Uveitis/Moon Blindness): In this serious illness, corneal defects are often associated with inflammation. Therefore, the condition should never be treated independently with cortisone-containing ointments during a disease flare-up without prior examination by a vet.
Symptoms of corneal defect
There are various signs that can indicate a corneal defect in a horse:
- Increased blinking, eye closure, or a completely closed eyeThe horse is more sensitive to light and often closes its eye.
- Watery eyes and eye dischargeIncreased tear production or a purulent discharge from the eye may indicate inflammation or infection.
- Redness of the eyeThe conjunctiva can become inflamed, leading to a noticeable redness of the eye.
- Corneal cloudingA milky or cloudy cornea is another indicator of a defect.
- Swelling of the eyelid or the eye areaA corneal defect can cause swelling around the eye as a secondary symptom.
- Pain and restlessnessThe horse may show signs of pain, such as aversion to light (photophobia) or rubbing its head.
Diagnosis and Treatment of Corneal Defects
The diagnosis of a corneal defect usually requires a thorough examination by an experienced veterinarian. This includes:
- Corneal pigmentationThe veterinarian can use a special fluorescent dye solution to make corneal defects visible.
- Slit-lamp examinationA slit lamp allows the eye to be examined on multiple levels and any damage to be identified.
- Bacteriological examinationsIn cases of suspected infection, the vet can take samples to determine the exact cause.
The treatment of a corneal defect depends on the severity of the injury. Common treatment options include:
- Drug therapyEye drops or ointments containing anti-inflammatory, antibacterial, or pain-relieving ingredients are often used. In severe cases, antibiotic injections may also be necessary.
- Eye protectionThe eyes are protected from dust and rubbing by the horse with a fly mask.
- Pain managementPain medication can help the horse to relieve discomfort and support healing.
- Surgical procedures (very rarely)In cases of deep corneal ulcers or infected corneal defects, surgery may be necessary to treat or transplant the tissue.
Important for eye conditions:
If there are signs of eye disease, the affected eye should be promptly rinsed, preferably with sterile saline solution or boiled (and absolutely cooled) water. If this significantly improves the symptoms, the horse can be treated with a FRESH eye ointment, for example, containing hyaluronic acid.
Up In no case should the horse be treated with the following ointments „on my own initiative“:
- Eye ointments from the „own“ human medicine stock
- Eye ointments from another horse
- Corticosteroid eye ointments
- Eye ointments that have been open for more than 10 days
Conclusion
Corneal defects in horses are a serious eye condition that requires prompt treatment and attention. As a horse owner, you should be aware of the symptoms and contact a veterinarian promptly if you suspect a corneal injury. With timely diagnosis and appropriate treatment measures, many corneal problems can be successfully treated and your horse's vision preserved.
Contact The Veterinary Practice for Horses Dr. Nina Rödig, to have your horses' eye health regularly checked. Our experts are on hand to offer advice and support, ensuring your horse remains healthy and vital.
