Felis ISSN 2398-2950

Trichiasis

Contributor(s): Dennis E Brooks, Paul Evans, Philip K Nicholls, David Williams

Introduction

  • Cause: normal facial hair (usually from the eyelid) is abnormally angled so that it contacts the cornea .
  • Occasionally seen in Persians with prominent nasal folds and medial lower lid entropion.
  • Can also result from eyelid scarring   →   lid distortion and lid colobomas and lid neoplasia Eyelid and conjunctiva: neoplasia (especially squamous cell carcinoma Squamous cell carcinoma).
  • Signs: red eye, ocular discharge, ocular pain, corneal ulceration.
  • Diagnosis: history, signs.
  • Treatment: surgical.
  • Prognosis: good-fair. Recurrence possible.

Pathogenesis

Etiology

  • Prominent nasal folds.
  • Iatrogenic (previous eyelid surgery causing lid distortion)   →   scarring.
  • Eyelid injury   →   scarring Eyelid: laceration.
  • Eyelid coloboma   →   abnormal eyelid margin.

Predisposing factors

General

  • Prominent nasal folds.

Pathophysiology

  • Persians: prominent nasal folds   →   corneal irritation   →   superficial keratitis Ulcerative keratitis (often secondary sequestrum formation).
  • Cicatricial: previous eyelid scarring (often iatrogenic)   →   lid distortion   →   trichiasis.

Diagnosis

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Treatment

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Outcomes

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Dziezyc J & Millichamp N J (1989) Surgical correction of eyelid agenesis in a cat. JAAHA 25 (5), 513-516 VetMedResource.
  • Bellhorn R W, Barnett K C & Henkind P (1971) Ocular colobomas in domestic cats. JAVMA 159 (8), 1015-1021 PubMed.


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