Canthus
(pl. canthi
, palpebral commissures
) is either corner of the eye where the upper and lower eyelids meet.
The bicanthal plane
is the transversal plane linking both canthi and defines the upper boundary of the midface.
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CANTHUS TICKETS
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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