Epicanthic fold sami eyes

With an accout for my. An epicanthal foldepicanthic foldor epicanthus is a skin fold of the upper eyelid from the nose to the inner side of the eyebrow covering the inner corner medial canthus of the human eye. The presence of an epicanthal fold is present in people of Epicanthic fold sami eyes Asian and Southeast Asian descent, as well as other ethnic groups including some Native Americans and Africans.

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Epicanthic fold sami eyes

An epicanthic fold or epicanthus [6] is a skin fold of the upper eyelid that covers the inner corner medial canthus of the eye. The highest frequency of occurrence of epicanthic folds is found in specific populations or ethnicities: East Asians , Southeast Asians , Central Asians , North Asians , Polynesians , Micronesians , Indigenous peoples of the Americas , and some African peoples especially among Khoisan and Nilotic peoples. Among South Asians , they occur at very high frequencies among the Nepalis , Bhutanese , [11] [ better source needed ] Northeast Indians , [11] Kirati people and certain Adivasi [11] tribes of Eastern and Southern India. It is also commonly found in Northern India , especially in Kashmir. The Hazara people in Afghanistan and Pakistan commonly have this trait. Epicanthic folds also occur, at a considerably lower frequency, in other populations: Europeans e. The degree of development of the fold between individuals varies greatly, and attribution of its presence or absence is often subjective, being to a degree relative to the occurrence of the trait within the community of the specific observer. Also, its frequency varies clinally across Eurasia. Its use, therefore, as a phenotypic marker to define biological populations is debatable. The epicanthic fold is often associated with greater levels of fat deposition around the eyeball. The adipose tissue is thought to provide greater insulation for the eye and sinuses from the effects of cold, especially from freezing winds, and to represent an adaptation to cold climates. It has also been postulated that the fold itself may provide a level of protection from snow blindness. Though its appearance in peoples of Southeast Asia can be linked to possible descent from cold-adapted ancestors, its occurrence in various African peoples is not open to this explanation. The epicanthic fold found in many African people has been tentatively linked to protection for the eye from the high levels of ultraviolet light found in desert and semi-desert areas. The exact evolutionary function and origin of epicanthic folds remains unknown.

Skin fold of the upper eyelid. In other projects.

Skin fold of the upper eyelid An epicanthic fold or epicanthus is a skin fold of the upper eyelid that covers the inner corner medial canthus of the eye. 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. Various factors influence whether epicanthic folds form, including ancestry, age, and certain medical conditions. Epicanthic folds also occur, at a considerably lower frequency, in other populations: Europeans e. The degree of development of the fold between individuals varies greatly, and attribution of its presence or absence is often subjective, being to a degree relative to the occurrence of the trait within the community of the specific observer. Also, its frequency varies clinally across Eurasia.

Also called epicanthal folds, they are common in people of East Asian heritage. Monolids are formed by a piece of skin on the eyelid that runs from the nose to the eyebrow and gives the eyelid the appearance of having no crease. In some cases, it can make the eyelid more prominent, creating a more narrow appearance in the eye. Monolids are normal and do not affect vision on their own. If a monolid is caused by a medical condition like Down syndrome , it could be linked with other eye troubles. This article explains how monolids appear, genetic causes, and possible ways to minimize the appearance of monolids. Human eyes have both upper and lower eyelids. The upper and lower eyelids meet at the corners of the eyes, an area known as the canthus. Most people have a visible crease in the upper lid, which gives the upper eyelid the appearance of having two sections. This is known as a double lid.

Epicanthic fold sami eyes

The epicanthic fold is a fold in the upper eyelid skin that covers the inner aspect of the eyes. This fold usually starts from the nose and ends at the inner corner of the eyebrow. It is associated with a higher fat deposition around the eyes. The greater amount of fat tissue provides a higher level of insulation from cold to the eyes and the sinuses surrounding it. A higher incidence of the epicanthic folds found in the Asian population is associated with descent from ancestors living in colder climates. A hooded lid is a common facial feature in the Asian population, which is characterised by excess skin under the eyebrows. This may be seen in one or both eyes.

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Review articles on Epicanthal fold. They may persist where birth is pre-term, and sometimes also where the mother is alcoholic. Contents move to sidebar hide. 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. Many fetuses lose their epicanthic folds after three to six months of gestation. Retrieved 12 November Journal of Tropical Pediatrics. Symptoms of Epicanthal fold. Navigation menu Personal tools Log in Request account. Additional recommended knowledge. All humans initially develop epicanthal folds in the womb. Interested in hearing about new therapies? The two features are distinct; a person may have both epicanthal fold and upper eyelid crease, one and not the other, or neither.

In having a suspected eye lift, Renee Zellweger has eradicated a key facial feature of her Norwegian Sami heritage to look more traditionally 'European,' suggests a top professor of Finnish culture. Scroll down for video.

Epicanthal fold en Espanol. PMID The epicanthic fold is often associated with greater levels of fat deposition around the eyeball, a feature most accentuated in native North Siberian, Aleut and Inuit populations. September The two features are distinct; a person may have both epicanthal fold and upper eyelid crease, one and not the other, or neither. An epicanthic fold or epicanthus [6] is a skin fold of the upper eyelid that covers the inner corner medial canthus of the eye. CDC on Epicanthal fold. Frank Poirier, a physical anthropologist at Ohio State University, says the classical explanation of epicanthic fold depicts it as an adaptation to the tropical and arctic regions where many Asians live. Epicanthic Fold Watchlist. Sterling Dictionary of Anthropology.