What your eyes could reveal about your heart health

More than 2,000 years ago, the Greek mathematician Euclid began his treatise "Optics" with an assumption that now sounds peculiar: visual rays traveled out from the eye toward the objects we see.

AYO Production/Shutterstock More than 2,000 years ago, the Greek mathematician Euclid began his treatise Optics with an assumption that now sounds peculiar: visual rays travelled out from the eye towards the objects we see. We now know that vision works the other way around. But…