Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Arcus senilis (or arcus senilis corneae) is a white or gray opaque ring in the corneal margin (peripheral corneal opacity), 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.It is also called arcus adiposus, arcus juvenilis (when it occurs in younger individuals), arcus lipoides corneae or arcus cornealis; sometimes a gerontoxon.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.
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