Disease or Syndrome
keratoconus
[ ker-uh-toh-koh-nuhs ]
Subclass of:
Corneal Diseases
Etymology:
Greek keras = a horn + konos = a cone
Hence a conical shaped cornea.
Definitions related to keratoconus:
  • A cone-shaped deformity of the cornea characterized by the presence of corneal distortion secondary to thinning of the apex.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2021
  • A degenerative, structural disorder of the eye, characterized by a cone-shaped protrusion of the cornea. It may lead to visual disturbances.
    NCI Thesaurus
    U.S. National Cancer Institute, 2021
  • A noninflammatory, usually bilateral protrusion of the cornea, the apex being displaced downward and nasally. It occurs most commonly in females at about puberty. The cause is unknown but hereditary factors may play a role. The -conus refers to the cone shape of the corneal protrusion. (From Dorland, 27th ed)
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
  • Noninflammatory, usually bilateral protrusion of the cornea in which the apex is displaced downward and nasally; the conus refers to the cone shape of the corneal protrusion.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • Keratoconus is a bulging distortion of the cornea, leading to loss of visual acuity. Keratoconus is a slowly progressive thinning and bulging of the cornea, usually bilateral, beginning between ages 10 and 25. Its cause is unknown.
    Merck Manuals
    Merck & Co., Inc., 2020
  • Keratoconus (KC) is a progressive, noninflammatory, bilateral (but usually asymmetrical) ectatic corneal disease, characterized by paraxial stromal thinning and weakening that leads to corneal surface distortion. Visual loss occurs primarily from irregular astigmatism and myopia, and secondarily from corneal scarring.
    Medscape
    WebMD, 2019
  • Keratoconus (ker-uh-toe-KOH-nus) occurs when your cornea - the clear, dome-shaped front surface of your eye - thins and gradually bulges outward into a cone shape.
    Mayo Clinic
    Mayo Foundation for Medical Education and Research
  • Keratoconus is the degeneration of the structure of the cornea, which is the clear tissue covering the front of the eye. In this condition, the shape of the cornea slowly changes from the normal round shape to a cone shape. Most people who develop keratoconus start out nearsighted, which tends to become worse over time. The earliest...
    NIH Genetic and Rare Diseases
    National Center for Advancing Translational Sciences
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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.