corneal arcus


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cor·ne·al ar·cus

(kōrnē-ăl ahrkŭs)
A thin, whitish circle around the iris; normal finding in old people.
Synonym(s): arcus senilis.

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 arcusenlarge picture
Fig. C19 Advanced corneal arcus
References in periodicals archive ?
This is represented boy peripheral corneal thinning (between corneal arcus and the limbal vessels).
26 Corneal arcus is age related,27 however it was observed in our patients having FH as early as four and a half years.
Two types are described: Type I has a perilimbal clear zone similar to corneal arcus and contains numerous holes, while type II has neither holes nor a clear zone.