If the light blue iris ring you are seeing is at or near the margin between the iris (colored part of your eye) and the sclera (white part) and forms a large ring around that margin it is likely to be a deposit of cholesterol. It does not damaging to the eye and does not interfere with vision. This is very common in older individuals but if you are a young adult it may suggest high cholesterol. If the ring you are seeing is anywhere else on the iris other than following the outside margin, it should be checked.
according to that site it can be Calcific Band Keratopathy , caused by several things , thay recommend a complete metabolic/chem20 blood test and a cholesterol panel to determine if it's a calcium issue, cholesterol or something else...
a band keratopathy (calcium in the cornea) and cornea arcus (cholesterol in the cornea) are usually easily distinguished by an ophthalmologist. See an ophthalmologist to determine which it is. Find an Eye MD near you at www.aao.org
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