A 68-year-old man visits his primary care nurse practitioner…
A 68-year-old man visits his primary care nurse practitioner for a routine check-up. On examination, the NP notes a grayish-white ring encircling the cornea of both eyes. The patient has a history of hypertension and hyperlipidemia but is otherwise healthy. The patient is concerned about the appearance of his eyes and asked the NP what this condition indicates. What is the most likely diagnosis for the presence of this ring around the cornea?