This is a medical condition which affects the lower lid of the eye. Entropin is when the eyelid folds inwards causing discomfort, as the eyelashes will rub constantly against the cornea, causing irritation. Entropin is usually caused by genetic factors but very rare cases, it may be congenital. This can cause an extra fold of skin to grow on the lower eyelid, medically known as Epiblepharon.
Entropin can sometimes cause secondary pain which can scar the eyelid and even cause nerve damage. It can affect the upper or lower eyelids, even both eyes. This is known as bilateral entropin. In human cases (also common in dogs) this condition is most common in people over the age of 60.
Early symptoms of Entropin are sensitivity to wind and light, sagging around the eye area and redness or pain around the eye. Treatment is very simple. Surgery to remove tendons and then the shortening of muscles with a couple of stitches under a local anesthetic, offers an excellent prognosis.
Aging is the most common cause of Entropin. Loose skin and muscles along with spasms can also lead contribute.
As mentioned above, Entropin is very common in dogs. Its more common in purebreds. A few are listed below.
Akita, Pug, Chow Chow, St Bernard, Springer Spaniel, Bull Mastiff, Great Dane, Irish Setter, Poodle, Labrador.