What Is Entropion?

Patients describe a relentless feeling that something is in the eye, with redness, tearing, and pain that drops and rinses do not fix. They may see their own lashes turned in when they look closely, and the eye is often chronically irritated and light-sensitive. Because it feels like a foreign body that will not go away, and the eye looks angry and red, they want to know what is causing the scratching and whether it is harming their sight.

Normally the lid margin and lashes point away from the eye. In entropion the lid rolls inward, turning the lashes and the rough lid skin against the delicate cornea and conjunctiva with every blink. This is essentially a lash-versus-cornea problem, which is why the eye feels like it is being scratched constantly.

The mechanical rubbing irritates and can scratch the corneal surface, producing pain, redness, tearing, and light sensitivity. Over time, repeated abrasion can cause corneal scarring, infection, or ulceration, which can threaten vision. Unlike ectropion, where exposure is the main risk, entropion's danger is direct abrasion — which is why it should not be left to grind on the eye.

Involutional entropion, the most common form, is caused by the same aging changes that loosen the lower lid, plus a tendency for one lid muscle to override and roll the margin inward; horizontal laxity and weakened lid support let the lid turn in, especially when squeezing the eye shut. Spastic entropion can be triggered by irritation and forceful blinking. Cicatricial entropion results from scarring of the inner lining of the lid that mechanically pulls the margin in — from chronic inflammation, autoimmune conditions, trauma, chemical injury, or, globally, trachoma, an infectious cause of scarring entropion. Congenital entropion is uncommon.

Whatever the mechanism, the shared consequence is lashes and lid skin abrading the cornea. This drives the symptoms — foreign-body sensation, pain, redness, reflex tearing, and light sensitivity — and creates the risk of abrasion, scarring, secondary infection, and ulcer. The cause matters for treatment: simple laxity is repaired by tightening and rotating the lid, while scarring entropion may need procedures that address the shortened, scarred inner lining.

Entropion should always be addressed because the lashes are rubbing the eye, but seek prompt care if you have:

• Increasing eye pain, marked redness, or light sensitivity
• A white or gray spot on the cornea (possible ulcer)
• Discharge or worsening blurred vision
• A scratching sensation that does not improve with lubrication

A corneal ulcer or infection can threaten vision and needs urgent evaluation. Even without these, ongoing lash rubbing warrants timely treatment rather than watchful waiting.

The doctor confirms the lid margin is turned inward and checks whether the lashes are touching the eye, sometimes asking you to blink or squeeze to bring out a spastic component. Lid tension and laxity are tested, and the inner lining of the lid is inspected for scarring that would indicate a cicatricial cause. A slit-lamp exam, usually with dye staining, evaluates the cornea for abrasions, scarring, or an ulcer from the rubbing lashes. Distinguishing simple laxity from scarring determines which surgical repair is needed.

Temporary measures protect the eye while surgery is arranged: heavy lubrication with artificial tears and ointment, taping the lower lid to rotate it outward, a bandage contact lens in some cases, and, for spastic entropion, a botulinum toxin injection to turn the lid out for several months.

The definitive treatment is surgery. For age-related entropion, the lid is tightened and the margin rotated back to its normal position, a short and highly effective outpatient procedure. Cicatricial entropion from scarring often requires a more involved repair to release or lengthen the scarred inner lining, sometimes with a graft. Any corneal abrasion or infection from the rubbing lashes is treated at the same time.

• Do not just endure the scratching; the lashes are actively rubbing the cornea and can cause damage.
• Do not pluck the inward lashes as a permanent solution — they regrow and the lid is still turned in.
• Do not skip lubrication while waiting for treatment; a dry, abraded cornea is more likely to scar or become infected.
• Do not rub or squeeze the eye, which can worsen a spastic inward turn.
• Do not ignore new pain, a white corneal spot, discharge, or blurring, which suggest an ulcer needing urgent care.

Call May Eye Care Center if your eye feels persistently scratchy and red, or you can see your lower lashes turning inward, so we can protect the cornea and plan a corrective procedure. Seek urgent care for increasing pain, a white spot on the eye, discharge, or vision change, which may indicate a corneal ulcer. Patients throughout the Hanover area are welcome to schedule an evaluation.

Entropion is an inward-turning lid whose lashes rub and can damage the cornea, usually from age-related laxity; lubrication protects the eye short-term, and a quick lid surgery corrects it for good.