Canthus: Difference between revisions
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The '''bicanthal plane''' is the [[transversal plane]] linking both canthi and defines the upper boundary of the [[midface]]. |
The '''bicanthal plane''' is the [[transversal plane]] linking both canthi and defines the upper boundary of the [[midface]]. |
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[[Asian eyes]] tend to have the inner canthus veiled by the [[epicanthus]]. In [[Caucasians]] the inner corner tends to be exposed completely.<ref>Bongsik Kwon, Anh H. Nguyen: [https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4536067/ Reconsideration of the Epicanthus: Evolution of the Eyelid and the Devolutional Concept of Asian Blepharoplasty] Semin Plast Surg. 2015 Aug; 29(3): 171–183. [[doi]]: 10.1055/s-0035-1556849, [[PMCID]]: PMC4536067</ref> |
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==Commissures== |
==Commissures== |
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* 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 ''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. |
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* The ''medial palpebral commissure'' (commissura palpebrarum medialis; internal canthus) is prolonged for a short distance toward the [[Human nose|nose]], and the two eyelids are separated by a triangular space, the lacus lacrimalis. |
* The ''medial palpebral commissure'' (commissura palpebrarum medialis; internal canthus) is prolonged for a short distance toward the [[Human nose|nose]], and the two eyelids are separated by a triangular space, the lacus lacrimalis. |
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Revision as of 09:17, 5 July 2017
 | This article needs additional citations for verification. (August 2009) |
| Canthus | |
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| Identifiers | |
| FMA | 59222 |
| Anatomical terminology | |
Canthus (pl. canthi, palpebral commissures) is either corner of the eye where the upper and lower eyelids meet.[1] More specifically, the inner and outer canthi are, respectively, the medial and lateral ends/angles of the palpebral fissure.
The bicanthal plane is the transversal plane linking both canthi and defines the upper boundary of the midface.
Asian eyes tend to have the inner canthus veiled by the epicanthus. In Caucasians the inner corner tends to be exposed completely.[2]
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 a lateral displacement of the inner canthi of the eyes, giving an appearance of a widened nasal bridge.[3] It is associated with Waardenburg syndrome.[4]
See also
References
- ^ "canthus" at Dorland's Medical Dictionary
- ^ Bongsik Kwon, Anh H. Nguyen: Reconsideration of the Epicanthus: Evolution of the Eyelid and the Devolutional Concept of Asian Blepharoplasty Semin Plast Surg. 2015 Aug; 29(3): 171–183. doi: 10.1055/s-0035-1556849, PMCID: PMC4536067
- ^ Genetic Hearing Loss from UTMB, Dept. of Otolaryngology, 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.
- ^ Tagra S, Talwar AK, Walia RL, Sidhu P (2006). "Waardenburg syndrome". Indian J Dermatol Venereol Leprol. 72 (4): 326. doi:10.4103/0378-6323.26718. PMID 16880590.
{{cite journal}}: CS1 maint: unflagged free DOI (link)
External links
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