Arcus senilis
| Arcus senilis | ||
| ICD-10 | H18.4 | |
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| ICD-9 | 371.41 | |
| OMIM | 107800 | |
| DiseasesDB | 17120 | |
| MeSH | C11.204.299.070 | |
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Overview
Arcus (ar·cus) (ahr´kəs) pl. ar´cus [L. “a bow”] [TA] arch: a general term used in anatomical nomenclature to designate any structure having a curved or bowlike outline.
A. cor´neae , A. cornea´lis or Arcus senilis (or Arcus senilis corneae) is a white or gray opaque ring in the corneal margin peripheral (corneal) opacity, present at birth, or appearing later in life, and becoming quite frequent in those over 50; it results from cholesterol deposits in or hyalinosis of the corneal stroma and may be associated with ocular defects or with familial hyperlipidemia.
Also called A. adiposus, A. juvenilis (When it occurs in younger individuals), A. lipoides corneae, and A. senilis.
It is most often found in the elderly, hence the name.
It can be a sign of disturbance in lipid metabolism, an indicator of conditions such as hypercholesterolemia, hyperlipoproteinemia or hyperlipidemia.
A unilateral arcus is a sign of carotid artery disease or ocular hypotony.