Entropion is an abnormality of the eyelids in which the eyelid “rolls” inward. This inward rolling often causes the hair on the surface of the eyelid to rub against the cornea (outer part of the eyeball) resulting in pain, corneal ulcers or corneal erosions. This corneal damage can also result in corneal scarring, that can interfere with vision.
Most dogs will squint, hold the eye shut and tear excessively (epiphora). Interestingly, many flat-faced dogs with medial entropion (involving the corner of the eyes near the nose) exhibit no obvious signs of discomfort. In most cases, both eyes are affected.
Are certain breeds more likely to have entropion ?
Entropion is considered a hereditary disorder. While the exact genetics are unknown, many breeds are identified as having this problem. These breeds include :
American Staffordshire terrier
Staffordshire bull terrier
Old English sheepdog
Toy and miniature poodle
English and American cocker spaniel
How is entropion treated ?
The treatment for entropion is surgical correction. A section of skin is removed from the affected eyelid to reverse its inward rolling. In many cases, a primary, major surgical correction will be performed, and will be followed by a second, minor corrective surgery later. Two surgeries are often performed to reduce the risk of over-correcting the entropion, resulting in an outward-rolling eyelid known as ectropion. Most dogs will not undergo surgery until they have reached their adult size at six to twelve months of age.