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Dogs
Entropion
Entropion is a
medical condition in which the
eyelids fold
inward. It is very uncomfortable, as the
eyelashes rub
against the eyeball
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
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
Chow Chow,
Shar Pei,
St.
Bernard,
Cocker Spaniel,
Springer
Spaniel,
Labrador Retriever,
Bull Mastiff,
Great Dane,
Irish Setter,
and Poodle. 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. 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
- Dogs
- Gelatt, Kirk N. (ed.)(1999). Veterinary Ophthalmology (3rd ed.).
Lippincott, Williams & Wilkins.
ISBN 0-683-30076-8
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