Trichiasis 

  • Author: Robert H Graham, MD; Chief Editor: Hampton Roy Sr, MD   more...
 
Updated: Mar 24, 2009
 

Background

Trichiasis, a very common lid abnormality, is defined as the misdirection of eyelashes toward the globe. The misdirected lashes may be diffuse across the entire lid or in a small segmental distribution.

Trichiasis has numerous causes, and the strategies to correct this problem are dictated by the anatomic abnormality causing the lash misdirection.

Entropion (close up). Note that the lashes of the Entropion (close up). Note that the lashes of the lower lid are not easily visible because they are turned in under the lower lid. The pen markings are for lower lid retractor reinsertion and orbicularis debulking. The patient also will have a lateral tarsal strip.
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Pathophysiology

The primary causes of trichiasis are involutional changes, posterior lamellae scarring (superior or inferior), epiblepharon, and distichiasis.

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Epidemiology

Frequency

United States

Trachoma is relatively uncommon in the United States. Exact numbers on the frequency of trichiasis are unknown. Simple trichiasis involving only a few lashes is relatively common. Diffuse trichiasis involving the entire lid margin is much less common, and it is seen primarily in countries where trachoma is endemic.

Mortality/Morbidity

The primary morbidity associated with trichiasis is corneal abrasion, corneal scarring, and microbial keratitis. This condition can be vision threatening.

Race

No known racial predilection is evident.

Sex

No known sexual predilection is evident.

Age

Trichiasis can occur in all ages; however, it is seen most commonly in the adult years.

Epiblepharon, one of the common causes of trichiasis, is found primarily in children.

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Proceed to Clinical Presentation
 
 
Contributor Information and Disclosures
Author

Robert H Graham, MD  Senior Associate Consultant, Department of Ophthalmology, Mayo Clinic, Scottsdale, Arizona

Robert H Graham, MD is a member of the following medical societies: American Academy of Ophthalmology, American Medical Association, and Arizona Ophthalmological Society

Disclosure: WebMD/eMedicine Salary Employment

Specialty Editor Board

Jorge G Camara, MD  Professor of Ophthalmology, Department of Surgery and Director of Fellowship Training Program in Ophthalmic Plastic and Reconstructive Surgery for Countries Served by the Aloha Medical Mission, University of Hawaii John A Burns School of Medicine

Jorge G Camara, MD is a member of the following medical societies: American Academy of Ophthalmology, American Medical Association, and American Society of Ophthalmic Plastic and Reconstructive Surgery

Disclosure: Nothing to disclose.

Simon K Law, MD, PharmD  Assistant Professor of Ophthalmology, Jules Stein Eye Institute; Chief of Section of Ophthalmology Surgical Services, Department of Veterans Affairs Healthcare Center, West Los Angeles

Simon K Law, MD, PharmD is a member of the following medical societies: American Academy of Ophthalmology, American Glaucoma Society, and Association for Research in Vision and Ophthalmology

Disclosure: Nothing to disclose.

Mark T Duffy, MD, PhD  Consulting Staff, Division of Oculoplastic, Orbito-facial, Lacrimal and Reconstructive Surgery, Green Bay Eye Clinic, BayCare Clinic; Medical Director, Advanced Cosmetic Solutions, A BayCare Clinic

Mark T Duffy, MD, PhD is a member of the following medical societies: American Academy of Ophthalmology, American Medical Association, American Society of Ophthalmic Plastic and Reconstructive Surgery, Sigma Xi, and Society for Neuroscience

Disclosure: Allergan - Botox Cosmetic Consulting fee Consulting

Lance L Brown, OD, MD  Ophthalmologist, Affiliated With Freeman Hospital and St John's Hospital, Regional Eye Center, Joplin, Missouri

Disclosure: Nothing to disclose.

Chief Editor

Hampton Roy Sr, MD  Associate Clinical Professor, Department of Ophthalmology, University of Arkansas for Medical Sciences

Hampton Roy Sr, MD is a member of the following medical societies: American Academy of Ophthalmology, American College of Surgeons, and Pan-American Association of Ophthalmology

Disclosure: Nothing to disclose.

References

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Trachoma of upper lid. The trachomatous right upper lid was difficult to evert.
Epiblepharon in an Asian child.
Lower lid trichiasis, Ellman radiofrequency follicle ablation.
Lower lid trachoma with cicatrix.
Ocular cicatricial pemphigoid, symblepharon formation.
Bilateral involutional entropion. Note the periocular redness from constant lid rubbing due to irritation.
Entropion (close up). Note that the lashes of the lower lid are not easily visible because they are turned in under the lower lid. The pen markings are for lower lid retractor reinsertion and orbicularis debulking. The patient also will have a lateral tarsal strip.
Snap back test. Retraction of the skin of the lower lid on the right.
Snap back test. The lid does not reapproximate the globe after the retraction is released.
Postoperative lid retraction with lower lid tissue stuck down to hardware on the orbital rim after a transconjunctival approach to a rim and floor fracture on the left eye. The lashes are now turned toward the eye. The patient also has a phthisical right eye.
 
 
 
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