Entropion
Learn what the condition is, how it may be detected early, how it is treated or managed, and which breeds or species are linked to it.
Condition snapshot
A concise guide to the condition’s pattern, detection, management and urgency.
This snapshot is a general guide, not a diagnosis or treatment plan. New, severe or worsening signs require veterinary assessment.
About the condition
Entropion is inward rolling of an eyelid margin so that hair or skin rubs directly against the cornea. The condition causes continuous irritation and can lead to painful corneal ulcers, scarring and pigmentation if the abnormal contact persists. It may affect the upper or lower eyelid and can involve one or both eyes.
In cats, entropion can be developmental, conformational or acquired. Some brachycephalic cats have facial structure that alters eyelid position, while older cats may develop inward rolling after loss of tissue support around the eye. Pain from another ocular condition can also cause temporary spasm that pulls the eyelid inward.
Signs include squinting, tearing, discharge and face rubbing. The eye may look red or cloudy, and ulcers can develop where hairs repeatedly contact the corneal surface. A cat may become reluctant to tolerate head handling because the irritation is constant.
Fluorescein stain is used to check for ulceration. The veterinarian must distinguish true structural entropion from spastic entropion caused by eye pain, because treating the painful eye can sometimes allow the lid to return to normal.
The condition should be assessed functionally rather than cosmetically. A slightly unusual eyelid that does not touch the cornea may not require correction, while a subtle inward roll causing hair contact is clinically important. Persistent corneal irritation warrants treatment before chronic scarring or recurrent ulceration damages vision.
Because the cornea is exposed to friction every time the cat blinks, even mild inward rolling can create thousands of repeated contacts each day. The resulting discomfort may be constant rather than episodic. Correcting the lid position removes that mechanical source of injury instead of repeatedly treating the ulcers it creates.
Tear production and other ocular structures may also be assessed.
Screening & Early Detection
Kittens and cats from facial conformations associated with eyelid abnormalities should have eyelid position checked during routine examinations. Squinting, persistent tearing or a damp tear track should not automatically be attributed to breed appearance.
At home, owners can look for hairs touching the surface of the eye, frequent blinking, rubbing and recurrent discharge. Corneal cloudiness, a blue haze or visible ulceration requires prompt veterinary assessment. A cat that has recently developed ocular pain can temporarily roll the eyelid inward, so timing is important.
The veterinarian examines the eyelids before and after topical anaesthetic when needed and performs fluorescein staining to identify corneal damage. Older cats with newly developed entropion need consideration of weight loss, orbital change or other disease affecting eyelid support.
There is no laboratory screening test for entropion. Early detection is visual and functional. Persistent hair-to-cornea contact should be corrected before chronic rubbing creates deeper ulcers or permanent scar tissue.
Diagnosis is made by examining eyelid position and the cornea.
Treatment & Management
Treatment depends on whether the entropion is temporary or structural. Spastic entropion caused by a painful ulcer may improve when the underlying eye disease is treated and pain is controlled. Temporary eyelid tacking can sometimes protect the cornea while a kitten grows or while swelling settles.
Persistent structural entropion is treated surgically by removing and reshaping a small amount of eyelid tissue so the margin sits away from the cornea. The correction must be carefully planned because excessive tissue removal can create the opposite problem and leave the eye poorly protected.
Existing corneal ulcers are treated at the same time with appropriate topical medication and pain relief. An Elizabethan collar prevents rubbing during healing. Sutures and the cornea are rechecked according to the surgeon’s plan.
The prognosis is usually excellent when correction is performed before severe corneal scarring develops. Recurrent squinting after surgery deserves reassessment because residual entropion, suture irritation or a separate corneal problem may be present. Breeding decisions should avoid perpetuating severe conformational eyelid disease that predictably compromises ocular comfort.
After successful correction, routine eye checks continue because a cat can still develop unrelated corneal disease later in life.
Breeds or species affected
British Longhair
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British Shorthair
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Exotic Shorthair
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Himalayan
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Maine Coon
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Minuet
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Persian
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Scottish Fold
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