Canthus

Canthus (pl. canthi, palpebral commissures) is either corner of the eye where the upper and lower eyelids meet. 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.

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

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Canthus (mythology)

In Greek mythology, the name Canthus (Κάνθος) may refer to:

Canthus, one of the Argonauts, son of Canethus and grandson of Abas (alternately, son of Abas). He was killed by Caphaurus (or Cephalion), son of Amphithemis and Tritonis, in Libya. According to Valerius Flaccus, however, he was killed by Gesander during the Colchian war.

Canthus, one of the sons of Aegyptus, who married and was killed by Eurydice, daughter of Danaus.