Disease or Syndrome
trichiasis Audio
tri·chi·a·sis [ trih-kahy-uh-sis ]
Subclass of:
Eyelid Diseases
Etymology:
Greek thrix (trich-) = hair + -iasis = condition or disease
Definitions related to trichiasis:
  • A disease of the eye in which the eyelashes abnormally turn inwards toward the eyeball producing constant irritation caused by motion of the lids.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • Inversion and rubbing of the eyelashes against the globe of the eye.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
  • Trichiasis is an anatomic misalignment of eyelashes, which rub against the eyeball, in a patient with no entropion.
    Merck Manuals
    Merck & Co., Inc., 2025
  • 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.
    Medscape
    WebMD, 2025
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.