Canthus (anatomy)
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Caption = Front of left [[eye]] with [[eyelids]] separated to show medial [[canthus]]. |
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'''Canthus''' (pl. '''canthi''', '''palpebral commissures''') is either corner of the [[eye]] where the upper and lower [[eyelid]]s meet.
The '''bicanthal plane''' is the [[transversal plane]] linking both canthi and defines the upper boundary of the [[midface]].
==Commissures==
* 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.
==Surgery==
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).
==Pathology==
"Dystopia canthorum" is associated with [[Waardenburg syndrome]].
==See also==
*[[Epicanthal fold]]
==External links==
* [http://www.sheinman.com/Aanatomyp1.htm Diagram at sheinman.com]
* [http://www.solobambini.com/measure_canthus.html Diagram at solobambini.com] (measure of [[Pupillary distance]])
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{{Accessory organs of the eye}}
[[Category:Eye]]