(CNN) The eyes may offer a "window into the soul," as poets say, but they also have a lot to say about your health. Dry eyes can be a sign of rheumatoid arthritis. A coppery gold ring circling the iris is a key sign of Wilson's disease, a rare genetic disorder that causes copper to build up in the brain, liver and other organs, slowing poisoning the body. Checking for signs of disease is a key reason the doctor dilates your eyes to peer deep into their depths at your annual eye exams. A new study, which researchers say is the first of its kind, says the retina may also be able to provide us with an easy, noninvasive way to determine our body's true biological age -- which may or may not mirror our chronological age.

Source: CNN January 19, 2022 22:22 UTC