A white or grayish ring that sometimes appears around the edge of the cornea (the clear front part of the eye) in older people.
From Greek 'geron' (old man) + 'toxon' (bow, arc), describing the arch-like appearance. This is an ophthalmological term referring to an age-related eye condition also called 'arcus senilis.'
Gerontoxon is so common in people over 80 that it's almost a normal part of aging, but it actually represents deposits of cholesterol and fats in the eye—sometimes signaling high cholesterol levels that doctors should monitor.
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