Entropion is a condition in which the eyelid, usually the lower lid, turns inward toward the eye. As a result, the eyelashes and skin rub against the surface of the eye and can cause irritation, tearing, redness, and discomfort. ^[1][3][4]

Although it may begin as a mild annoyance, untreated entropion can damage the cornea over time. That is why persistent symptoms should not be ignored, especially in older adults, where age-related changes are a common cause. ^[1][2]

Why does entropion happen?

Age-related weakening of the eyelid structures is the most common reason. However, scarring, prior surgery, inflammation, infection, trauma, or muscle spasm can also pull the lid inward. In some regions, scarring from eye infections may be particularly relevant. ^[1][2][4]

The key issue is that the lid no longer rests in the correct position. Once the lashes repeatedly scrape the eye, symptoms can worsen quickly. ^[1][3]

What symptoms can occur?

Typical symptoms include tearing, redness, a foreign-body sensation, light sensitivity, mucus discharge, eye pain, and blurred vision if the cornea becomes irritated. Some people say it feels like sand or a grain of dust is constantly in the eye. ^[1][3]

Symptoms may get worse when blinking, in windy conditions, or if the eye becomes dry. Corneal injury becomes more likely the longer the friction continues. ^[1][2]

How is it diagnosed?

Diagnosis is usually made during an eye examination. The ophthalmologist checks lid position, eyelid laxity, corneal health, tear film status, and whether scarring or muscle spasm is contributing. ^[1][2]

Because the problem is often mechanical, the clinical exam is more important than laboratory testing. The main goals are confirming the lid malposition and evaluating whether the cornea is already affected. ^[1][4]

How is entropion treated?

Lubricating drops or ointments may help protect the eye temporarily, but they do not correct the underlying lid position. Taping the eyelid or short-term measures may be used in selected cases. Definitive treatment is often surgical, especially when symptoms are persistent or the cornea is at risk. ^[2][4]

The exact procedure depends on the cause. Age-related entropion is often corrected by tightening or repositioning the eyelid structures. ^[1][2]

When should you seek medical care?

You should seek care if your eye is constantly watery, red, irritated, painful, or sensitive to light, especially if you notice the eyelid turning inward. Sudden vision change or severe pain requires prompt attention. ^[1][3]

Because corneal injury can occur gradually, waiting too long may allow a fixable eyelid problem to become a more serious eye surface problem. ^[1][4]

FAQ

Is entropion dangerous?

It can become serious because repeated rubbing may damage the cornea. ^[1][4]

Does it always need surgery?

Not always immediately, but surgery is often the definitive treatment. Temporary protective measures may be used first. ^[2][4]

Which eyelid is usually affected?

The lower eyelid is affected more commonly. ^[1][3]

Can aging cause entropion?

Yes. Age-related weakening of eyelid tissues is a common cause. ^[1][2]

When is urgent care needed?

Severe pain, light sensitivity, or vision changes need prompt evaluation. ^[1][3]