Your eyes hold the key to your true biological age

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. High levels of cholesterol can cause a white, gray or blue ring to form around the colored part of your eye, called the iris. 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.