A new optical illusion excellently illustrates just how finicky our eyes are when it comes to perceiving colors.

How many purple dots do you see in the image above? Are they all the same hue? This new optical illusion, developed by biomedical optics engineer Hinnerk Schulz-Hildebrandt, is more revealing than you ...

A head-scratching optical illusion challenges the perception of color and how the brain plays tricks on us. In an image created by the UK contact lens vendor Lenstore, a series of lilac letters ...

Your brain is lying to you right now. Not maliciously, and not because something’s wrong with it. It’s doing exactly what evolution designed it to do, making split-second decisions about the world ...

Optical illusions are often described as mind-boggling, mind-bendint, brain-frying, and everything in between. But let's be honest, most of the time all they elicit is a slight smirk, or maybe the odd ...