Your eyes are your window to the world and the portals to your soul. But how much do you really know about them?

Do you know how much your eye weighs? Or how many shades of gray your eye can see?

Did you know that brown eyes are really just blue eyes with a brown layer on top?

Get ready to wow yourself and your friends with these 50 insane facts that will tell you everything you ever wanted to know about the human eye.

50 Insane Facts About The Eye

From Visually.

Related on MNN: