Hello and thanks for your question. I don't know if you just asked this question under another customer name in the past several minutes, but if so, I just finished addressing your question under that encounter. In the event that you did not, here is my explanation. Please let me know what questions you may have.
This graying that the eye doctor is referring to is likely what is called arcus senilis. This is when cholesterol and lipids deposit in the cornea in what becomes a circumferential pattern around the outside of the cornea, effectively making it appear as though it were covering the iris (colored part of the eye). In patients younger than 60, or those who do not carry a diagnosis of high cholesterol (hyperlipidemia) or in those patients in whom this only happens in one eye, it is common for the eye doctor to recommend that the primary care doctor order these blood tests to determine to what extent you may have high cholesterol. If your PCP did a workup for this and it showed no significantly increased cholesterol, then this is the most important thing. You can still have this accumulation of cholesterol without overt high cholesterol findings on the blood tests, but usually it is picked up by the blood tests to some degree, even if it is only a little bit.
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