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 ...

Perception researchers have long known about the structural and functional features that differentiate our central vision from our peripheral vision. The central (or foveal) region of our retinas are ...

What colour are the dots in this image? A mind–boggling optical illusion has been developed by scientists to show how our perception of colour can be easily skewed. At first glance it may seem like a ...

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 ...

The famous Ebbinghaus illusion, named for its discoverer, the German psychologist Hermann Ebbinghaus (1850–1909). Despite appearances, the two orange circles are the same size. Have you ever looked at ...