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.

<p>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.</p>