Open Access Articles- Top Results for Canthus


For other uses, see Canthus (disambiguation).
Front of left eye with eyelids separated to show medial canthus.
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Anatomical terminology

Canthus (pl. canthi, palpebral commissures) is either corner of the eye where the upper and lower eyelids meet.[1] More specifically, the medial and lateral canthi would be described as the medial and lateral ends/angles of the palpebral fissure. (Edit - Where as medial and lateral are the appropriate positional terms for most of the body, the preferred terminology for the eye is inner and outer for the canthus. E.g. Inner Canthus or Outer Canthus.)

The bicanthal plane is the transversal plane linking both canthi and defines the upper boundary of the midface.


  • The lateral palpebral commissure (commissura palpebrarum lateralis; external canthus) is more acute than the medial, and the eyelids here lie in close contact with the bulb of the eye.
  • The medial palpebral commissure (commissura palpebrarum medialis; internal canthus) is prolonged for a short distance toward the nose, and the two eyelids are separated by a triangular space, the lacus lacrimalis.


Canthoplasty refers to a plastic surgery of the medial and/or lateral canthus.

A canthotomy involves cutting the canthus, often performed to release excessive orbital pressure (i.e., from orbital hemorrhage or infection).


"Dystopia canthorum" is a lateral displacement of the inner canthi of the eyes, giving an appearance of a widened nasal bridge.[2] Dystopia canthorum is associated with Waardenburg syndrome.[3]

See also


  1. "canthus" at Dorland's Medical Dictionary
  2. Genetic Hearing Loss from UTMB, Dept. of Otolaryngology. DATE: March 17, 2004. RESIDENT PHYSICIAN: Jing Shen. FACULTY PHYSICIAN: Ronald W. Deskin, MD. SERIES EDITORS: Francis B. Quinn, Jr., MD and Matthew W. Ryan, MD.
  3. Tagra S, Talwar AK, Walia RL, Sidhu P (2006). "Waardenburg syndrome". Indian J Dermatol Venereol Leprol 72 (4): 326. PMID 16880590. doi:10.4103/0378-6323.26718. 

External links

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