'Entropion' is a
medical condition in which the
eyelids fold inward. It is very uncomfortable, as the
eyelashes rub against the
cornea constantly. Entropion is usually caused by
genetic factors and may be
congenital.
Trachoma infection may cause
scarring of the inner eyelid, which may cause entropion.
Symptoms of entropion include:
★ Redness and
pain around the eye
★
Sensitivity to
light and
wind
★ Sagging
skin around the eye
★ Excessive
tearing
★ Decreased
vision, especially if the
cornea is damaged
Treatment is a simple
surgery in which excess skin of the outer lids is removed. Prognosis is excellent if surgery is performed before the cornea is damaged.
Causes
★ Congenital
★ Aging
★ Scarring
★ Spasm
Entropion in dogs

Canine entropion
Entropion has been documented in most
dog breeds, although there are some breeds (particularly
purebreds) that are more commonly affected than others. These include the
Pug,
Chow Chow,
Shar Pei,
St. Bernard,
Cocker Spaniel,
Boxer,
Springer Spaniel,
Labrador Retriever,
Cavalier King Charles Spaniel,
Bull Mastiff,
Great Dane,
Irish Setter, and
Poodle.
[ Veterinary Ophthalmology, Gelatt, Kirk N. (ed.), , , Lippincott, Williams & Wilkins, 1999, ISBN 0-683-30076-8 ] The condition is usually present by six months of age. Entropion can also occur secondary to pain in the
eye, scarring of the eyelid, or nerve damage. The upper or lower eyelid can be involved, and one or both eyes may be affected. When entropion occurs in both eyes, this is known as "bilateral entropion."
Upper lid entropion involves the
eyelashes rubbing on the eye, but the lower lid usually has no eyelashes, so hair rubs on the eye.
Surgical correction is used in more severe cases. A strip of skin and
orbicularis oculi muscle are removed parallel to the affected portion of the lid and then the skin is
sutured.
Shar Peis, who often are affected as young as two or three weeks old, respond well to temporary eyelid tacking. The entropion is often corrected after three to four weeks, and the sutures are removed.
References
;Humans
★ http://www.kellogg.umich.edu/patientcare/conditions/entropion.html
★ http://www.nlm.nih.gov/medlineplus/ency/article/001008.htm
★ http://www.upei.ca/~cidd/Diseases/ocular%20disorders/entropion.htm
;Dogs
See also
★ Ectropion
★ List of eye diseases and disorders