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The 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 lacrimal caruncle, or caruncula lacrimalis, is the small, pink, globular nodule at the inner corner (the medial canthus) of the eye. [1] It consists of tissue types of neighbouring eye structures. It may suffer from lesions and allergic inflammation.
An epicanthic fold or epicanthus [6] is a skin fold of the upper eyelid that covers the inner corner (medial canthus) of the eye. [3] However, variation occurs in the nature of this feature and the possession of "partial epicanthic folds" or "slight epicanthic folds" is noted in the relevant literature.
The fissure may be increased in vertical height in Graves' disease, which is manifested as Dalrymple's sign.It is seen in disorders such as cri-du-chat syndrome. In animal studies using four times the therapeutic concentration of the ophthalmic solution latanoprost, the size of the palpebral fissure can be increased.
In snakes and amphibians, the canthus, canthal ridge or canthus rostralis, [1] is the angle between the flat crown of the head and the side of the head between the eye and the snout, [2] or more specifically, between the supraocular scale and the rostral scale.
The plica semilunaris is a small fold of bulbar conjunctiva on the medial canthus of the eye.It functions during movement of the eye, to help maintain tear drainage via the lacrimal lake, and to permit greater rotation of the globe, for without the plica the conjunctiva would attach directly to the eyeball, restricting movement. [1]
Canthopexy is the surgical fixation of the canthus. A canthoplasty is plastic surgery at the canthus. [8] A canthorrhaphy is suturing of the outer canthus to shorten the palpebral fissure. [8] A canthotomy is the surgical division of the canthus, usually the outer canthus. [8] A lateral canthotomy is the surgical division of the outer canthus ...
The medial palpebral ligament (medial canthal tendon) is a ligament of the face.It attaches to the frontal process of the maxilla, the lacrimal groove, and the tarsus of each eyelid.