n
An opaque, grayish-white ring at the periphery of the cornea occurring in older adults.
Arcus senilis
| Dental Dictionary: arcus senilis |
(är′kəs senil′is)
n
n
| 5min Related Video: Arcus senilis |
| Medical Dictionary: arcus cor·ne·a·lis |
(kôr'nē-ā'lĭs)
n.
n.
An opaque, grayish ring at the periphery of the cornea just within the sclerocorneal junction, common among the elderly and resulting from a deposit of fatty granules in, or hyaline degeneration of, the lamellae and cells of the cornea. Also called anterior embryotoxon, arcus adiposus, arcus juvenilis, arcus senilis, gerontoxon.
| WordNet: arcus senilis |
Note: click on a word meaning below to see its connections and related words.
The noun has one meaning:
Meaning #1:
an arc-shaped whitish deposit sometimes seen in the cornea
Synonym: arcus
| Wikipedia: 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] |
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| 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) present at birth[citation needed] or appearing later in life and becoming quite frequent after age 50.
Contents |
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.
References
- ^ Correlating corneal arcus with atherosclerosis in familial hypercholesterolemia. Zech LA Jr, Hoeg JM. Lipids Health Dis. 2008 Mar 10;7:7. PMID 18331643
External links
- Photo at kumc.edu
- Photo at hoppingeyeassociates.com
- Photo at apollolipids.org
- Definition at Merriam-Webster Medical Dictionary
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 | Dental Dictionary. Mosby's Dental Dictionary. Copyright © 2004 by Elsevier, Inc. All rights reserved. Read more |
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| Medical Dictionary. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Read more |
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