Visual Illusions!

Everytime you look at television or video on the web, you experience the illusion of movement and change. That's because visual perception has a limit of 1/24th of a second per image. If the images change faster than that, our brain puts them together in a continuous sequence. Think about that metaphor: All broadcast media is an illusion. Hee!
The brain also interprets movement where there is none, because our eyes are always moving. If they ever attach a camera to what our pupils actually point at, you would experience motion sickness. Because of the perpetual motion, a static image like the one below, looks like it's moving, when it's not.


For more fun optical illusions, click here. And just keep clicking the previous or next buttons for more. H/T to Scienceblogs.