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arcus senilis
arcus senilis (ˈɑːkəs sɪˈnaɪlɪs) or arcusn (Pathology) an opaque circle around the cornea of the eye, often seen in elderly people[Latin: senile bow]Thesaurus| Noun | 1. | arcus senilis - a whitish deposit in the shape of an arc that is sometimes seen in the corneaarcuscornea - the transparent dome-shaped anterior portion of the outer covering of the eye; it covers the iris and pupil and is continuous with the sclera |
EncyclopediaSeearcusarcus senilis
arcus [ahr´kus] (pl. ar´cus) (L.) arch; bow.arcus adipo´sus arcus corneae.arcus cor´neae (arcus cornea´lis) a white or gray opaque ring in the corneal margin; it may be present at birth or appear in childhood (see arcus juvenilis), but the condition is particularly common in those over 50 years old (see arcus senilis). It results from cholesterol deposits in or hyaline degeneration of the corneal stroma and may be associated with ocular defects or with familial hyperlipidemia.arcus juveni´lis arcus corneae in young persons.arcus seni´lis arcus corneae in the elderly. (See Atlas 4, Part E).ar·cus se·ni·'lisan opaque, grayish ring at the periphery of the cornea just within the sclerocorneal junction, of frequent occurrence in the aged; it results from a deposit of fatty granules in, or hyaline degeneration of, the lamellae and cells of the cornea. Synonym(s): anterior embryotoxon, arcus adiposus, arcus cornealis, arcus juvenilis, arcus lipoides, gerontoxon, linea corneae senilis, lipoidosis corneaearcus senilis Geriatrics A cloudy, opaque ring around the cornea and iris which, in those younger than 50, often indicates hypercholesterolemia, but in the elderly has no significancear·cus se·ni·lis (ahr'kŭs sĕ-nī'lis) An opaque, grayish ring at the periphery of the cornea just within the sclerocorneal junction; frequent occurrence in old people; it results from a deposit of fatty granules in, or hyaline degeneration of, the lamellae and cells of the cornea.
Synonym(s): anterior embryotoxon, arcus cornealis, gerontoxon.  ARCUS SENILISarcus senilisAn opaque white ring about the periphery of the cornea, seen in the aged. It is caused by the deposit of fat granules in the cornea or by hyaline degeneration. See: illustrationSee also: arcusarcus senilis A white ring near the outer margin of the CORNEA. This is a normal feature of age and is of no significance. Vision is never affected.corneal arcus A greyish-white ring (or part of a ring) opacity occurring in the periphery of the cornea, in middle and old age. It is due to a lipid infiltration of the corneal stroma. With age the condition progresses to form a complete ring. That ring is separated from the limbus by a zone of clear cornea. The condition can also appear in early or middle life and is referred to as arcus juvenilis (or anterior embryotoxon); it is somewhat whiter than corneal arcus. Arcus juvenilis is often associated with heart disease in men (Fig. C19). Syn. arcus senilis; gerontoxon. See marginal furrow. " > Fig. C19 Advanced corneal arcusar·cus se·ni·lis (ahr'kŭs sĕ-nil'is) An opaque, grayish ring at the periphery of the cornea just within the sclerocorneal junction; frequent occurrence in old people.
Synonym(s): anterior embryotoxon, gerontoxon. arcus senilis
Related to arcus senilis: arcus juvenilis, corneal arcusSynonyms for arcus senilisnoun a whitish deposit in the shape of an arc that is sometimes seen in the corneaSynonymsRelated Words |