The color of your sunglasses plays a bigger role than you may think. Whether you're wearing pink, brown or green lenses, here's how your sunglasses' color affects their performance.

Can siblings have different eye colors? If so, why? Yes, they absolutely can have different eye colors, said Stevens. “It will depend on the shuffle of genes that are inherited by each sibling ...

Did you know some people have red eyes? How about violet? We spoke to an optometrist to learn how rare some eye colors are and how eye color is determined.

With brown eyes taking an overwhelming lead, all of the other eye colors have lower percentages. According to WorldAtlas, 8-10 percent of the world's population have blue eyes.

The color spectrum used in the study, showing 20 different shades of blue Sinkevičiūtė et al.

People with heterochromia—or different-colored eyes—have a striking and unique appearance. Here's what causes it and just how rare it is.