Entropion

Entropion
Entropion and trichiasis secondary to trachoma
SpecialtyMedical genetics Edit this on Wikidata

Entropion is a medical condition in which the eyelid (usually the lower lid) folds inward.[1] It is very uncomfortable, as the eyelashes continuously rub against the cornea causing irritation. Entropion is usually caused by genetic factors. This is different from when an extra fold of skin on the lower eyelid causes lashes to turn in towards the eye (epiblepharon).[2] In epiblepharons, the eyelid margin itself is in the correct position, but the extra fold of skin causes the lashes to be misdirected. Entropion can also create secondary pain of the eye (leading to self trauma, scarring of the eyelid, or nerve damage). The upper or lower eyelid can be involved, and one or both eyes may be affected. When entropion occurs in both eyes, this is known as "bilateral entropion". Repeated cases of trachoma infection may cause scarring of the inner eyelid, which may cause entropion.[3] In human cases, this condition is most common to people over 60 years of age.[4]

  1. ^ "Entropion". Elements of Morphology. National Human Genome Research Institute. Retrieved 2022-10-30.
  2. ^ Katowitz, James A.; Katowitz, William R. (2017-11-30). Pediatric Oculoplastic Surgery. Springer. p. 336. ISBN 9783319608143.
  3. ^ Rabiu M, Alhassan MB, Ejere HO, Evans JR (2012). "Environmental sanitary interventions for preventing active trachoma". Cochrane Database of Systematic Reviews. 2 (2): CD004003. doi:10.1002/14651858.CD004003.PUB4. PMC 4422499. PMID 22336798.
  4. ^ Tony Smith, ed. (1992). The British Medical Association Family Doctor Home Adviser. Chart 80: "Painful or irritated eye". ISBN 0-86318-864-8 p. 184