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The upper eyelid crease is a common variation between people of White and East Asian ethnicities. [9] Westerners commonly perceive the East Asian upper eyelid as a "single eyelid". [9] However, East Asian eyelids are divided into three types – single, low, and double – based on the presence or position of the lid crease. [10]
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.
This page was last edited on 22 February 2007, at 17:29 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
The tarsi (sg.: tarsus) or tarsal plates are two comparatively thick, elongated plates of dense connective tissue, about 10 mm (0.39 in) in length for the upper eyelid and 5 mm for the lower eyelid; one is found in each eyelid, and contributes to its form and support.
Stye of the upper eyelid 8-year-old boy with an external hordeolum of lower lid. The first sign of a stye is a small, yellowish spot at the center of the bump that develops as pus and expands in the area. [7] Other stye symptoms may include: A lump on the top or bottom eyelid; Localized swelling of the eyelid; Localized pain; Redness; Tenderness
[23] [24] The upper end of the range is given in terms of normal visual performance as 10 8 cd/m 2 (100,000,000 or one hundred million candelas per square meter). [25] Dilation and constriction of the pupil. The eye includes a lens similar to lenses found in optical instruments such as cameras and the same physics principles can be applied.
Blepharochalasis – An immune-mediated inflammation of the eyelid that is characterized by exacerbations and remissions of eyelid edema which results in a stretching and subsequent atrophy of the eyelid tissue, leading to the formation of redundant folds over the lid margins. It typically affects only the upper eyelids, and may be unilateral ...
Concerning the upper eyelid, a blepharoplasty procedure can resolve the loss of peripheral vision, caused by the slackness of the upper-eyelid skin draping over the eyelashes; the outer and the upper portions of the field of vision of the patient are affected and cause him or her difficulty in performing mundane activities such as driving an ...