What is the appearance of Arcus senilis in the eye?

Arcus senilis is characterized by the formation of a blue, gray, or white opaque ring at the periphery of the cornea. This condition is a result of lipid deposits that accumulate in the corneal stroma as part of the aging process, and it often indicates elevated cholesterol levels in some cases, but it can also occur with age regardless of lipid levels. The appearance of this ring is notable and can be seen upon examination of the eye, providing a visible sign of this condition.

The other options describe features that are not associated with Arcus senilis. Yellow tan deposits on the retina refer to other retinal conditions, black spots on the cornea could indicate a different issue such as corneal deposits or issues related to glaucoma, and red lesions on the conjunctiva are indicative of conditions like conjunctivitis or subconjunctival hemorrhage. Understanding these distinctions helps to recognize the specific characteristics of Arcus senilis clearly.