Entropion and Ectropion: Why an Eyelid Turns In or Out, Why a Watery Eye Can Be a Dry Eye, What Actually Repairs It, and Why This Is Not a Cosmetic Blepharoplasty

The patient is 72. For most of a year, their left eye has watered on walks, stung in the evening, and felt as if a grain of sand had moved in for good. They have been through allergy drops, a course of antibiotic ointment, and two pairs of new glasses. Now they have booked a cosmetic consultation because the lower lid looks droopy, and they assume an eyelid lift will tidy it up. What they most likely have is entropion or ectropion, and the ordinary cosmetic operation is not the repair for either one.

Entropion and ectropion are mirror-image problems of eyelid position. In entropion, the lid margin rolls inward and the lashes sweep across the eye. In ectropion, the lid margin sags or turns outward and leaves the eye exposed. They live in an awkward spot between ophthalmology and plastic surgery: the complaint can sound cosmetic, the consequences are medical, and the wrong operation can make the lid worse.

This piece covers how to tell them apart, what causes each one, what temporary measures actually do, how surgical repair works, and how all of it relates to a cosmetic blepharoplasty. The evidence base here is mostly case series and a handful of small trials, and we will say so where it matters.

What entropion and ectropion are, and how to tell them apart

The short answer: entropion is an eyelid margin that turns inward so the lashes touch the eye, ectropion is a margin that turns outward or falls away from the eye, and both usually affect the lower lid of older adults.

A healthy lower lid is a small piece of engineering. It rests against the eyeball with light, even tension, held at each end by tendons and supported by a firm plate of tissue called the tarsus. Its lashes point out, and a tiny drainage opening near the inner corner, the punctum, sits in the film of tears. Take away some of that tension and the lid can fail in either direction.

Common differences between the two:

• Entropion feel: scratching, stinging, a foreign-body sensation, and light sensitivity, often worse in spells because the lid can roll in and then flip back.
• Ectropion feel: dryness, burning, a heavy or tired eye, crusting, and tears running down the cheek.
• Entropion look: the lashes disappear from view, and the eye can be red. Sometimes the lid looks normal until the patient squeezes it shut.
• Ectropion look: the pink inner lining of the lid shows, and the lid stands away from the eye, sometimes only near the inner corner.

Both are common enough that they should not be treated as curiosities. A large survey of older adults, published by Damasceno and colleagues in Ophthalmic Plastic and Reconstructive Surgery in 2011, found involutional entropion in 2.1 percent of participants and involutional ectropion in 2.9 percent. The sex pattern differed: entropion was slightly more common in women, and ectropion was clearly more common in men (5.1 percent versus 1.5 percent). Prevalence rose with age.

The misdiagnosis pattern is familiar. Watering gets called allergy. Redness gets called conjunctivitis. A gritty eye gets called dry eye, and sometimes it is, but the drops never address why. A close cousin is trichiasis, in which individual lashes grow in the wrong direction while the lid itself sits normally. That matters because plucking may help trichiasis for a few weeks and does nothing for a lid that is rolling inward.

The watering deserves its own explanation, because it confuses nearly everyone. A wet eye can be an irritated eye. When the surface dries or a lash scrapes it, the eye makes reflex tears. In ectropion, the punctum can also drift out of the tear film, so tears that would normally drain into the nose spill over the lid instead. So the patient mops their cheek all day while the surface of the eye stays dry. Anyone who has read our piece on dry eye after eyelid surgery will recognize the paradox.

What causes a lid to turn: age, scarring, paralysis, and the less obvious triggers

The short answer: most cases come from age-related laxity, but scarring, facial nerve weakness, mechanical weight, and acute irritation each produce their own version, and the cause decides the repair.

Involutional (age-related). This is the most common type of both conditions. The tendons at the corners stretch, and the lid gets longer than the space it occupies. In entropion, the retractors that normally stabilize the lower edge of the lid can loosen, and the muscle in front can ride up over the lid margin and push it inward. Globe position seems to play a part too: the Damasceno study found smaller axial globe projection in entropion patients, which fits the clinical impression that an eye sitting deeper in the socket gives the lid less to rest against.

Cicatricial (scarring). Here, something has shortened a layer of the lid. If scar contracts the inner lining, the lid is dragged inward, which is entropion. Causes include severe drug reactions such as Stevens-Johnson syndrome, chemical burns, ocular cicatricial pemphigoid, and trachoma, which remains a major cause of scarring trichiasis in parts of the world. Long-term use of some eye drops has also been linked to a pemphigoid-like scarring picture, a detail worth raising for patients on years of treatment for glaucoma, as discussed in our piece on LASIK, cataract surgery, glaucoma, and blepharoplasty.

If scar shortens the outer skin, the lid is pulled away from the eye, which is ectropion. Common causes:

• Sun damage: years of it leave the lower lid skin thin, tight, and short, a pattern that overlaps with actinic keratosis.
• Skin cancer treatment: defects and grafts near the lid can contract, which is one reason Mohs reconstruction around the eye is planned with lid position in mind.
• Prior cosmetic surgery: excess skin or scar pull after lower blepharoplasty can drag the lid down, covered in our piece on revision blepharoplasty and lower lid retraction.
• Resurfacing and burns: deep ablative laser or peel injury near the lid can have the same effect.
• Chronic dermatitis: eczema or contact allergy around the eyes, including reactions to drops, can tighten the skin over time.

Paralytic. The muscle that closes the lid also supports it. When the facial nerve fails, as in stroke, tumor surgery, or Bell's palsy and its aftermath, the lower lid can sag away and the upper lid may not close. This is the version with the most urgent exposure risk, particularly when corneal sensation is reduced.

Mechanical. A heavy lesion or swelling on the lower lid or cheek can simply pull the lid down. Tumors, cysts, and marked swelling are the usual suspects, and the distinction matters because the lump, not the lid, is the thing to deal with.

Acute spastic entropion. After eye surgery, an infection, or a bout of irritation, the muscle can spasm and roll the lid inward. This form can settle once the trigger resolves, though it often unmasks an underlying laxity.

Congenital and epiblepharon. True congenital entropion and ectropion are uncommon. Epiblepharon, a horizontal fold of skin that pushes lashes against the eye, is more often seen in East Asian children and may improve as the face grows. It is a different problem from the crease question in double eyelid surgery, though the two can get discussed together.

There is also a sleep link. Floppy eyelid syndrome, in which a very lax upper lid flips easily, is strongly associated with obstructive sleep apnea. A 2022 meta-analysis in Graefe's Archive estimated it in about 22 percent of people with sleep apnea, and a 2023 meta-analysis reported sleep apnea in 57 percent of people with floppy eyelid syndrome. Those are different denominators, and neither proves that every lax lid hides a sleep disorder. It is still a good reason to ask about snoring, and to read our piece on sleep apnea before cosmetic surgery before any anesthetic.

"A lid that turns in or out is not a tired-looking eye. It is a failed mechanical support for the cornea, and the repair has to answer the mechanical question before anyone discusses how it looks."

The exam, and why a change on one side needs a closer look

The short answer: a useful eyelid exam tests horizontal laxity, the corner tendons, and scar, checks the cornea, and treats a lid that changes on one side as something that might be a lesion.

The tests are simple, and a patient can watch them being done:

• Distraction test: the examiner pulls the lower lid away from the eye and estimates the gap. Published cutoffs for significant laxity vary, with sources commonly using more than about 5 or 6 millimeters.
• Snap-back test: the lid is drawn down and released before a blink. A healthy lid returns promptly, and a lax one lingers.
• Forced blink: squeezing the lids shut can make an intermittent entropion declare itself in the room. This matters because a patient can arrive on a good day.
• Upward skin push: gently pushing the cheek skin upward helps show whether short skin is contributing, which marks out a scarring component.
• Punctum and tear check: the examiner looks at where the drainage opening sits and may test whether the drainage system is open.
• Slit-lamp exam with dye: fluorescein shows surface scratches, which is the part of the exam that says how urgently the eye needs protection.

Corneal involvement changes the conversation. A lash scraping or a surface drying day after day can lead to abrasions, ulcers, and scarring, and that can threaten vision. Sudden pain, a white spot on the cornea, marked light sensitivity, or a drop in vision call for same-day eye care, not an appointment for next month's cosmetic consultation.

Then there is the question of why the lid changed. Age-related laxity is usually gradual and often appears on both sides, though not always equally. A change on one side, particularly with a firm area, lost lashes, or a persistent patch of redness, deserves a closer look. Skin cancers near the eyelid can pull and distort the lid margin, and sebaceous carcinoma can masquerade as a recurrent stye or stubborn inflammation, which is also why our piece on chalazion and stye warns about lumps that keep returning. If the surgeon proposes tightening a lid without explaining why only one side changed, ask.

A complete history helps too. It should cover prior eyelid or laser procedures, facial weakness, long-term eye drops, sun exposure, autoimmune disease, and medications. Bulging eyes or lid retraction point somewhere else altogether, toward the territory of thyroid eye disease, where a position problem has a very different cause.

Patients should also know who does this work. Oculoplastic surgeons (ophthalmologists with fellowship training in eyelid and orbital surgery) perform these repairs routinely, and many plastic surgeons do as well. The title matters less than whether the surgeon does functional lid repair regularly, can examine the cornea or works with someone who does, and can describe their own recurrence experience. That is the same logic we apply when asking about surgeon case volume.

What tape, drops, Botox, and stitches can do, and how surgical repair works

The short answer: temporary measures protect the eye and buy time, but lasting repair usually means surgically correcting the specific cause, most often by tightening the lid and reattaching what has come loose.

Temporary options are real treatment, but they should be described honestly:

• Lubricating drops and ointment: these protect the surface, and they treat none of the anatomy.
• Taping the lid: a small strip of tape on the cheek can pull an inturned lid out or support a sagging one. It works until the tape comes off, and skin irritation is common.
• Bandage contact lenses: these can shield the cornea from lashes for a period, under eye-care supervision, and they carry an infection risk.
• Botulinum toxin: small doses into the lower lid muscle can weaken the inward roll. In a prospective study of 30 patients in the journal Eye in 1997, Steel and colleagues reported success in 33 of 35 eyelids, with a mean effect of 12.5 weeks. Laxity shortened the effect. It is a bridge for someone waiting for surgery or too frail for it, and not a cure.
• Everting sutures: stitches placed through the lid can turn it outward, often in a short office procedure under local anesthetic. They can work well early on, but recurrence is the known weakness.

That recurrence is the subject of one of the few randomized trials in this field. Scheepers and colleagues, writing in Ophthalmology in 2010, compared everting sutures alone with everting sutures plus a lateral tarsal strip in involutional entropion. At 18 months, recurrence occurred in 6 of 29 eyelids (about 21 percent) with sutures alone and in none of 26 with the combined repair. The trial is small, and when a later meta-analysis recalculated that single-trial comparison, the confidence interval was wide and crossed no effect. The direction supports what surgeons observe, which is that addressing the laxity generally lasts longer. It is good evidence for a sensible idea, and not proof of a huge effect.

Surgical repair is chosen by mechanism:

• Lateral tarsal strip: the outer end of the lid is shortened and anchored back to the bone at the outer corner. This is the workhorse for horizontal laxity in both entropion and ectropion.
• Retractor reinsertion: in entropion, the loosened retractors are reattached to the tarsus to stabilize the lid.
• Medial procedures: a small diamond of tissue can be removed from the inner surface to turn a drifting punctum back toward the eye.
• Skin grafts and flaps: cicatricial ectropion often needs more skin, typically a graft from the upper lid or behind the ear, sometimes with a midface lift or cheek support. Tightening alone can make it worse, because it pulls a short lid harder.
• Mucous membrane grafts: cicatricial entropion may require a graft to replace scarred inner lining, sometimes from the mouth. Active scarring disease has to be controlled first, which is one more reason to know about autoimmune disease and surgery.
• Paralytic lid support: tightening, weights for the upper lid, and other supports may be combined with facial reanimation planning.

Many involutional repairs are done under local anesthetic, often with light sedation, as an outpatient procedure in a relatively short session. That matters for older patients, for whom the discussion of age limits for cosmetic surgery tends to be more about health than birthdays. Bruising and swelling usually run for one to two weeks. Blood thinners need a plan made with the prescribing doctor, and stopping them on one's own is a bad idea. Smokers should see the cessation timelines, particularly where a graft is involved.

Risks are generally modest, but they are not zero: recurrence, overcorrection (an entropion repair producing an outward turn, or the reverse), a rounded or tender outer corner, a visible notch, infection, bleeding, suture irritation of the eye, and graft problems. In the first weeks, the corner may feel tight and the eye may look slightly different from the other side. A patient who is told about this tends to be less alarmed by it.

Entropion, ectropion, and cosmetic eyelid surgery: what changes in planning

The short answer: a cosmetic blepharoplasty removes tissue and does not restore support, so an existing malposition should be repaired first or alongside it, and insurers judge the functional part on documented medical need.

The instinct of the 72-year-old in the opening story is understandable. The lid looks bad, and blepharoplasty is the operation people know. But removing lower lid skin from a lax lid can pull it further down. Laxity is one of the things a careful surgeon tests for before any lower blepharoplasty for exactly that reason, and the absence of that test is a reason to get a second consultation.

Some practical planning points:

• Fix function first. If a lid is turning in or out, a surgeon will usually address that first or in the same operation, with cosmetic refinement built around it.
• Know what a tightening does and does not do. A tarsal strip can improve the position of the lid, and some patients think the eye looks fresher. It does not remove under-eye bags or change hooding. Nor is it the same thing as a ptosis repair, which addresses an upper lid that sits too low.
• Watch canthal cosmetic trends. Canthal procedures performed for appearance change the same corner anatomy. If a patient has had a fox-eye or similar procedure, that history belongs in the consultation.
• Plan for skin that heals differently. Thin, sun-damaged lid skin, as described in our piece on how skin thins with age, affects graft choice and scar care.
• Think about the eye's other treatments. Patients with a recent or planned cataract operation, or with a glaucoma drop routine, should coordinate timing. Inward-turning lashes on an eye due for surgery are worth dealing with beforehand, since the surgeon will not want a contaminated, irritated surface.

Insurance is where the mix of cosmetic and functional work gets concrete. Entropion and ectropion repair is often treated as medically necessary when there is documentation of symptoms and of consequences such as corneal damage, chronic tearing, or irritation. But coverage varies by plan, and it is not automatic. A combined operation usually means the functional portion and the cosmetic portion are separated for billing, with the patient paying for the cosmetic part. Ask for that split in writing before surgery, along with any prior authorization requirement, and see our broader piece on what insurance covers and how medical necessity works.

Clinical photographs and a documented eye exam help that process. So does a clear record of what has already been tried. The patient with a year of allergy drops at least has a paper trail.

The honest summary

Entropion and ectropion are common, under-recognized problems of eyelid position in older adults. Entropion turns the lashes against the eye. Ectropion leaves the eye exposed and spills tears. Allergies, conjunctivitis, and dry eye often take the blame, sometimes for a year or longer, and in the meantime the surface of the eye takes the damage.

Temporary measures have a place. Lubricants, tape, and contact lenses protect the eye, Botox has small-study evidence for a few months of relief, and everting sutures can work with a real risk of recurrence. Lasting repair usually depends on correcting the mechanism, and for age-related laxity that often means a lateral tarsal strip with attention to the retractors. Scarring and paralysis need different plans, and tightening a lid that is short of skin can backfire.

A cosmetic blepharoplasty is not the fix. Done on a lax lid without support, it can make the situation worse. The right sequence is to establish why the lid moved, rule out a lesion if the change is one-sided, protect the cornea, repair the function, and only then decide whether anything cosmetic still matters. That is less exciting than the lift the patient came in asking for, but it leaves them with an eye that stops hurting.