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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.
Although an epicanthic fold can also be associated with a less prominent upper eyelid crease (a feature commonly termed "single eyelids" as opposed to "double eyelids"), the two features are distinct; a person may have both epicanthal folds and an upper eyelid crease, one and not the other, or neither. [2]
An anatomical variation in humans occurs in the creases and folds of the upper eyelid. An epicanthic fold, the skin fold of the upper eyelid covering the inner corner (medial canthus) of the eye, may be present based on various factors, including ancestry, age, and certain medical conditions. In some populations the trait is almost universal ...
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 ...
The epicanthic fold is the fold of the upper eyelids which covers the inner corners of the eyes. It has little do do with the presence or lack of a eyelid crease of the upper eye-lid (which is a separate issue).
Crease of the upper eyelid – having either a "single" or "double" eyelid Epicanthic fold; Lateral arcuate ligament; Horseshoe kidney - also known as ren arcuatus;
Epicanthic fold; Episcleral layer; External limiting membrane; Extraocular muscles; Optic cup (anatomical) Eyelid; F. Fibrous tunic of eyeball; Fovea centralis;
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]
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