So I've read in more than a few places that color doesn't exist outside our heads, it's just wavelengths of light. That our brains are the things that make color, same with sound (which is just ...

Before jumping on in we have one question on our minds: what is an optical illusion? Optical illusions are visuals that tend to be deceptive to the eye and brain. This is based on numerous factors ...

Optical illusions play tricks on your brain and can make you see things that aren't really there, from static images swirling around the page to images that stay with you even after you look away.

Our perception of color is constrained by the way different types of cone cells in our retina respond to light of different wavelengths. Our retina consists of short (S), medium (M), and long (L) ...