This video demonstrates that the human eye (and...  ...colors.  There is a discussion thread about this illusion at Reddit. YouTube link.

Look closely, can't you see four perfectly round circles? Or maybe you'll want to stand way back to see them. Don't scroll up and down; that might make you queasy! -via I Am Bored...

Look close: there are no bent lines in this tile collection. In fact, when I saw this, I thought how cool it would be to floor a room with this tile pattern! Link...

If you like the neat color optical illusion posted by Neatoramanaut Minnesotastan from the Up...

The spiral appears to have arms of green, blue, and pink/magenta - but what appears to be blue and what appears to be green are actually identical colors, confirmed by spectrometry.The reason they look [like] different c...

Remember the flipbook you had as a kid? Well, paper engineer (that's what he calls himself) Matt Shlian has just turned that concept upside down. Technically, that may be inside out. Or maybe front to back. Who knows! Ju...

A curveball will slowly shift by a couple of feet...  ...al feet. Watch this animation of the Best Visual Illusion of the Year winner to experience how this occurs....  ...as an abrupt change in direction (the break). Our illusions suggest that the perceived “break” may be cau...  ...stem. Like a curveball,...

While the magic of Photoshop has made it easier than ever to doctor photographs to portray the improbable or impossible, nothing quite matches doing a double take in real life. British art student Sara Watson parked a...

(YouTube link) Is this weird or what? This optical illusion known as Ames' Window was developed by Adelbert A...

Nirmalya Chakraborty created a series of fantastic print ads for Bose, featuring many of their sound equipments to create faces of famous musicians: Link | More at La pubelle blog...