Entropion is the most common congenital defect of the eyelids. It is caused by a long standing disease of the lids or by injury. Some cases are complicated by blepharospasm which is a spasm of the eyelid. Entropion in dogs is when the eyelids roll inward and rub against the cornea of the eye. This causes the dog a lot of discomfort. Breeds that are commonly affected are: Chow, Irish Setter, Chesapeake Bay Retriever, Saint Bernard, Great Pyrenees, Bulldog and Great Dane. It most commonly affects the lower eyelid and breeds with large heads and loose facial skin such as the Saint Bernard and the Bloodhound. Entropion can be found in the upper lid as well.
It can cause excessive tearing, conjunctivitis, pain that causes the dog to scratch or rub the eye and sensitivity to light. The constant rubbing of the eyelashes against the eye can cause corneal ulcers, which can cause scarring of the eye and affect the vision of the dog.
Young puppies that have entropion can have lid tacking that will temporarily fix the problem. Most vets do not like to do surgery on puppies less than 5-6 months of age.
Surgical correction is required for this condition.