Entropion. What is it and how is it treated?

Medical content revised by - Last revision 17/02/2021
Entropion. What is it and how is it treated?

What is an entropion?

Entropion is an eyelid malposition in which the eyelid is inverted or turned inward completely and causes the eyelashes and skin to rub against the surface of the eye. This causes pain, irritation and foreign body sensation. In addition, entropion can cause corneal erosions, infectious ulcers and vision loss. Entropion is more common in older people and generally affects only the lower eyelid, although the upper eyelid can also be affected by this condition.

Entropion should not be confused with ectropion, which consists of the opposite, an outward turning of the eyelid, exposing the conjunctiva that covers it to the outside.

There are different types of entropion: involutional or senile, congenital, cicatricial and spastic:

  • Involutional or senile: It is the most frequent and appears with age. It is associated with degenerative alterations of the muscles that stabilize the eyelid (retractor muscles), together with a greater lengthening of the tendon that gives tension to the eyelid, which affects its stability, producing an inversion of the lower eyelid.
  • Congenital: It is associated with genetic and birth problems.
  • Cicatricial: It originates from a conjunctival scar in the inner eyelid. It affects both upper and lower eyelids and can be associated with palpebral trichiasis – loose eyelashes directed towards the eyeball, different from entropion, in which the eyelid is completely turned and causes all the eyelashes to rub against the eye as a whole -.
  • Spastic: This entropion is caused by blepharospasm. It usually affects the lower eyelid and may be aggravated by a loss of elasticity in the elderly.

Causes

Entropion is usually associated with tissue aging. However, there are different causes depending on the type of entropion:

  • Involutional entropion is associated with weakening of the lower eyelid muscle of the eye as a result of aging.
  • Congenital entropion is caused by genetic and birth problems.
  • Cicatricial entropion is due to the formation of a scar caused by a burn, trauma or inflammation that may be non-infectious or infectious such as viral, bacterial or trachoma.
  • Spastic entropion is due to muscle contraction.

Symptoms

The symptoms of entropion result from the eyelashes and the skin of the outer eyelid rubbing against the surface of the eye:

  • Eye irritation or pain
  • Hypersensitivity to light and wind.
  • Foreign body or gritty sensation in the eye
  • Watery eyes (excessive tearing)
  • Redness of the eyes
  • Mucous discharge and crusting of the eyelids.

If the situation persists, erosions, eye infections such as ulcers and even corneal scarring may occur, so you need to be treated before serious eye damage occurs.


Treatment

The definitive treatment is surgery. The surgery is performed on an outpatient basis without hospitalization, under local anesthesia with sedation or general anesthesia in children, and consists of stabilizing the eyelid so that it does not turn inwards. There are different surgical techniques, which are applied according to the nature, position and severity of the entropion. Recovery is usually quite fast and any bruising from the surgery disappears in a short period of time. Symptoms disappear soon after surgery.

Some treatments may partially alleviate symptoms in the days prior to surgery, such as lubricating the eye with eye drops and ointments or using adhesive tape arranged vertically to prevent inversion of the entire palpebral margin.


entropión ICR

The definitive treatment for entropion is surgery


Frequently Asked Questions

Can entropion be cured without surgery?

No, the definitive treatment for entropion is surgery. Treatments such as eye lubrication and vertical adhesive tape may partially relieve symptoms prior to surgery, but do not completely cure entropion.

Can it be cured with botulinum toxin?

The only treatment to permanently cure entropion is surgery. However, botulinum toxin can temporarily treat spastic entropion, improving it, without curing it, for a few weeks. This option is only reserved for patients who cannot be operated on and have this type of entropion.

Can it reproduce after surgery?

Usually an intervention is enough to solve the problem. However, there may be some rare cases of recurrence and failure of surgery, which will be evaluated by your oculoplastic surgeon to find the most appropriate solution.

Can it cause blindness?

If entropion is not treated in time, it can cause permanent vision loss due to the potentially very serious corneal damage.

Can it be prevented?

In general, entropion is not preventable. The only case where it is possible to prevent it is entropion caused by trachoma, a bacterial infection. In this case, if you have redness and irritation in an area of the eye, and you live in a place where trachoma is frequent, you should visit your ophthalmologist to treat it before it causes eyelid damage.

When is it necessary to visit the ophthalmologist?

You should visit your ophthalmologist if you constantly notice any kind of rubbing in your eye or notice that your eyelashes are turning towards your eye. You should also see your eye doctor if you have already been diagnosed with entropion and you have rapidly increasing redness in your eyes, pain, sensitivity to light or decreased vision.

Can a physician or general surgeon cure it?

It is recommended that the operation be performed by an oculoplastic surgeon and not a general practitioner, since the oculoplastic surgeon is an ophthalmologist specialized in eyelid surgeries, knows the palpebral anatomy, the causes of the pathologies and their solutions, so he/she will take special care of the eye to preserve its vital function.

Is it hereditary?

Congenital entropion is due to genetic problems, so it can be inherited. However, the vast majority are not hereditary and there are other factors that cause entropion such as age, burns or scars.

How is it diagnosed?

Entropion is diagnosed by routine eye examination. Your doctor may ask you to close your eyes or move and feel your eyelid. These movements will help to see the exact position of the eyelid relative to the eye, the tension of the eyelid tendon, its tone and elasticity. In case the entropion is cicatricial, the doctor will also examine the conjunctival tissue that covers it.


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