Entropion is also colloquially referred to as a rolled eyelid and describes the inward rolling of the upper or lower eyelid. It can affect the entire eyelid or just part of it.
The hereditary form of rolled eyelids is the most common type. In Char Pei and Chow Chow breeds, entropion is congenital, meaning it is present from the day the puppy first opens its eyes. In German Pointing Dog, Labrador Retriever, Rottweiler, English Bulldog, and Poodle breeds, the changes usually only appear within the first year of life.
As a result of very painful processes on or in the eye, very strong blinking or a spasm of the eyelid can cause the eyeball to contract and the eyelids to roll inwards.
Age-related weakness of the connective tissue can lead to a lack of support, particularly in the upper eyelid, causing the eyelid to roll in and the eyelashes and hairs of the eyelid to rub against the eye.
After eyelid injuries or inflammation, scar tissue can also cause the eyelids to roll inward.
An eyeball that lies too deep in the eye socket can also cause entropion. In older dogs or those that have lost a lot of weight in a short period of time, the fat pad behind the eyeball disappears, causing the eyeball to sink further into the eye socket and causing the eyelid to roll inward.
The inward-turning eyelid causes hair and eyelashes to rub constantly against the conjunctiva and cornea, leading to permanent irritation. At the onset of the disease, affected animals blink more frequently, squint, and show eye discharge and redness. Due to the pain, they try to scratch or rub their eyes, which usually makes the symptoms worse.
As the disease progresses, severe and very painful conjunctival and corneal inflammation can develop. This often leads to a corneal ulcer, which in the worst case can result in loss of vision. Therefore, consult a veterinarian in good time if you notice any of the above signs of disease in your animal.
After a general clinical examination and a special eye examination, the veterinarian can usually make a reliable diagnosis very quickly. Further examinations may be necessary to determine the exact causes and type of entropion. In the case of spastic entropion, for example, the administration of pain-relieving eye drops can already lead to a clear diagnosis, as the eyelid rolls back out again when the pain subsides.
The treatment of entropion depends on the type and severity of the condition and the age of the animal. With the exception of a few cases, however, surgical treatment alone is promising.
Pain-related (spastic) entropion can be corrected conservatively by treating the underlying cause.
In young dogs, the first step is often a temporary correction involving only a minor surgical procedure. This method, known as "lid tacking," involves tightening the affected eyelid by stapling the overlying skin together. The skin staples are left in place for approximately four to six weeks. Depending on the severity of the entropion, this procedure may need to be repeated several times. However, in growing dogs, there is a good chance that the rolled eyelid will grow out.
Only in adult dogs with severe symptoms is a surgical eyelid lift usually performed, in which excess tissue and skin are removed and the edge of the eyelid is shortened. Depending on the type and severity of the entropion, various surgical techniques are available. Your veterinarian will discuss the exact procedure with you on a case-by-case basis or, if necessary, refer your pet to a specialist.
The prognosis depends primarily on the severity of the entropion and the healing process following conservative or surgical treatment. However, the prognosis is generally good.
As this is a partially hereditary disease, it cannot be completely prevented. Breeding measures should therefore be taken to reduce the incidence of the disease. This includes examining the parents and siblings of affected dogs for eyelid malformations and excluding them from breeding if any are found. Some breeding associations already require such examinations and have thus been able to significantly reduce the incidence of the disease.
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