Entropion in Dogs
Definition of Entropion
Entropion is the inversion, or rolling inward, of all or part of the edge of an eyelid, which causes the hair-bearing part of the lid to come into contact with the outside of the eyeball. This creates friction, irritation and discomfort and can severely damage the eye. Entropion has a strong genetic component and often is present at birth due to a hereditary abnormality in the dog’s facial structure. It is much more common in breeds with flat faces, short muzzles and heavy facial skin folds. It can also be acquired as a result of trauma, inflammation or infection and from skin laxity associated with aging. Entropion usually – but not always - occurs in both eyes. It can affect the upper eyelids, the lower eyelids or both, although it is more common on lower lids. Symptoms of the condition include excessive tearing, squinting, eye redness and pain.
Entropion can be developmental/congenital (called primary entropion) or acquired (called secondary entropion). It is common in dogs and usually is apparent before one year of age - especially if it is congenital. Developmental entropion has a strong genetic component and is frequently caused by a hereditary abnormality in facial conformation and eyelid support. It is much more common in certain breeds whose faces are flat and whose noses are short. Breeds with pronounced
The most common signs associated with entropion are excessive tearing, squinting and pain. Symptoms that owners may notice include:Signs of entropion usually – but not always - occur in both eyes. If the cause is genetic, clinical signs will be apparent early in life and can be seen even in puppies that are only a few weeks old. In fact, novice breeders of affected breeds (especially Chows and Shar-peis) may think that their puppies’ eyes
Entropion is a common eye problem in dogs and usually is clinically obvious, even in young puppies. However, there are several diagnostic procedures that are used by veterinarians to differentiate entropion from other eye or eyelid disorders, such as distichiasis (the presence of a double row of eyelashes, one or both of which are turned inward against the eyeball, causing friction, irritation and severe, chronic damage to the eye) and trichiasis (where normally placed lashes
Entropion is extremely painful. Severe developmental entropion will not improve without treatment, and the symptoms will worsen with time. If left untreated, entropion can lead to corneal scarring, erosion, ulceration, rupture and eventually blindness. The goals of treating this disorder are to relieve chronic irritation and pain, resolve any underlying causes of the condition and prevent further damage to affected eyes. Treatment can include temporary correction - especially in puppies - or permanent correction, once