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An image showing Entropion, a condition where the eyelid folds inward, causing irritation and discomfort.

What is entropion?

Entropion is a medical condition in which the eyelid (usually the lower lid) folds inward. It is very uncomfortable, as the eyelashes constantly rub against the cornea.

The upper or lower eyelid can be involved, and one or both eyes might be affected. When entropion occurs in both eyes, this is known as "bilateral entropion." Trachoma infection might cause scarring of the inner eyelid, which might cause entropion. In {human} cases, this condition is most common to people over 60 years of age.

Four basic anatomic defects which might lead to entropion:

  1. Horizontal lid laxity
  2. disinsertion or attenuation of retractors
  3. preseptal orbicularis overiding the pretarsal orbicularis muscle
  4. enophthalmos


Patients also find relief by pulling the lower eyelid away from the eye

An image showing an eye affected by entropion, a condition where the eyelid folds inward.


Forms of Entropion

  • Congenital
    • rare
    • differentiate from epiblepharon
    • treat by excising skin and orbicularis below eyelid margin
  • Acute Spastic
    • due to ocular inflammation and irritation
    • Treat underlying disease or quickert suture
  • Involutional entropion
    • Etiologies  
      • laxity or defect of the lower eyelid retractors (involutional=senile), due to lid retratctor dehiscence of the lower eyelid retractors (analogue of mueller's muscle) or of capsulopapebral fascia (analogue of levator)
      • horizontal eyelid laxity
      • preseptal orbicularis override
      • enophthalmos
    • Treatment
      • Thermal cautery
      • quickert suture
      • re-attachment of lower eyelid retractors
      • full thickness horizontal eyelid lid splitting and marginal rotation
      • orbicularis muscle tightening procedures
      • horizontal lid shorteing
      • tarsal strip


Close-up of an eye with entropion, showing the inward turning of the eyelid.Image showing a close-up view of an eye with entropion, a condition where the eyelid is turned inward, causing the eyelashes to rub against the eye

EtiologyCicatricial entropions

    • trauma
    • inflammation
    • pemphigus
    • pemphigoid
    • stevens-johnson syndrome
    • trachoma
  • Treatment
    • contact lenses
    • epilation
    • lubrication
    • mucous membrane graft
    • scleral grafts