Arcus senilis

Arcus senilis
Classification and external resources
Four representative slides of corneal arcus - arcus deposits tend to start at 6 and 12 o'clock and fill in until becoming completely circumferential. There is a thin, clear section separating the arcus from the limbus, known as the lucid interval of Vogt. Image from Zech and Hoeg, 2008.[1]
ICD-10	H18.4
ICD-9	371.41
OMIM	107800
DiseasesDB	17120
MeSH	D001112

Arcus senilis (or arcus senilis corneae) is a white or gray, opaque ring in the corneal margin (peripheral corneal opacity), or white ring around the iris. It is present at birth, but then fades; however, it is quite commonly present in the elderly. It can also appear earlier in life as a result of hypercholesterolaemia.

Alternative names

It is also called arcus adiposus, arcus juvenilis (when it occurs in younger individuals), arcus lipoides corneae or arcus cornealis; sometimes a gerontoxon.

Causes

It results from cholesterol deposits in or hyalinosis of the corneal stroma, and may be associated with ocular defects or with familial hyperlipidemia.

It can be a sign of disturbance in lipid metabolism, an indicator of conditions such as hypercholesterolemia, hyperlipoproteinemia or hyperlipidemia.

Unilateral arcus is a sign of decreased blood flow to the unaffected eye, due to carotid artery disease or ocular hypotony.

People over the age of 60 may present with a ring-shaped, grayish-white deposit of phospholipid and cholesterol near the peripheral edge of the cornea.

Younger people with the same abnormality at the edge of the cornea would be termed arcus juvenilis.

References

1. ^ Zech Jr, LA; Hoeg, JM (2008). "Correlating corneal arcus with atherosclerosis in familial hypercholesterolemia". Lipids in health and disease 7: 7. doi:10.1186/1476-511X-7-7. PMC 2279133. PMID 18331643. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2279133. 

External links

• Photo at kumc.edu
• Photo at hoppingeyeassociates.com
• Photo at apollolipids.org
• Definition at Merriam-Webster Medical Dictionary

This medical sign article is a stub. You can help Wikipedia by expanding it.v · Categories: Disorders of sclera and cornea Eye stubs Medical sign stubs Wikimedia Foundation. 2010. Игры ⚽ Нужна курсовая? Ten City Obstruction theory Look at other dictionaries: Arcus senīlis — Arcus senīlis, s. Altersring …   Meyers Großes Konversations-Lexikon ARCUS SENILIS — (gerontoxon), старческая дуга, помутнение в остальном нормальной роговой оболочки в виде узкого серпа или кольца на ее периферии. Наружная граница A. s. очерчена резко и отделяется от края роговицы узким прозрачным промежутком; внутренняя граница …   Большая медицинская энциклопедия Arcus senilis — Als Arcus senilis (corneae) (auch Arcus lipoides corneae, Greisenbogen oder Gerontoxon) wird ein durch Lipideinlagerung bedingter schmaler, vom Hornhautrand (Limbus) abgesetzter Trübungsring der bradytrophen Cornea des Auges bezeichnet. Er ist… …   Deutsch Wikipedia arcus senilis — /ahr keuhs seuh nuy lis/, Ophthalm. the appearance of a yellowish gray lipid ring around the margin of the cornea, occurring in aging persons. [1785 95; < L arcus senilis lit., old man s bow] * * * …   Universalium Arcus senilis — A cloudy opaque arc or circle around the edge of the eye, often seen in the eye of the elderly. * * * arcus se·nil·is sə nil əs n a whitish ring shaped or bow shaped deposit in the cornea that frequently occurs in old age * * * a greyish line in… …   Medical dictionary arcus senilis — corneal arcus a greyish line in the periphery of the cornea, concentric with the edge but separated from it by a clear zone. It begins above and below but may become a continuous ring. It consists of an infiltration of fatty material and is… …   The new mediacal dictionary arcus senilis — (син.: gerontoxon, старческая дуга) стойкое помутнение роговицы дегенеративного характера, наблюдающееся в пожилом возрасте и имеющее форму дуги или кольца, расположенного концентрически относительно лимба; развитие А. (с.) s. связано с… …   Большой медицинский словарь arcus senilis — noun A faint whitish ring around the iris in elderly people; discoloration of the iris with age …   Wiktionary arcus senilis — [ˌα:kəs sɪ nʌɪlɪs] noun Medicine a narrow opaque band encircling the cornea, common in old age. Origin L., lit. senile bow …   English new terms dictionary arcus senilis —   n. senile ring ; whitish ring round iris in eyes of old people …   Dictionary of difficult words 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”