Stare at the black dot in the center of this image and watch the red stripes spin.  At first, they should appear to be moving in a clockwise direction.  After a short while, however, they will suddenly appear to reverse and start moving counter-clockwise. If you lie on the ground and look directly up at [...]

Follow the instructions below to see a black and white photo of a building entrance appear in full color.  Then, as the illusion starts to wear off, the colored picture turns back to black and white. If you are looking for additional afterimage illusions like this one, make sure to check out the Jesus illusion [...]

Stare at the blinking green dot in the center of this animated image.  As you do, you will begin to experience a motion induced blindness.  The three yellow dots will start to randomly disappear and reappear.  Sometimes you will notice that one is missing and other times it may seem that two or all three [...]

Does that matchbox on the left appear to be the exact same size as the one on the right? They certainly do not look to be the same size, but they are.  This animation was created by Digitalvaho/Fred van Houten after being inspired by an article written by Bruno Ernst.  It is a variation of [...]

Does it look like the red portion of this animation is rotating clockwise and the blue portion is rotating counter-clockwise?  The blue part is actually stationary, only the red part is moving. This effect was described by Peter van der Helm in an abstract in 2006 and was a Top 10 finalist in the 2007 [...]

The Spinning Dancer illusion is an optical illusion resembling a female dancer spinning around in circles on one foot.  When you first view this image, you will either see the figure spinning in a clockwise or counterclockwise direction.  If you watch the image rotate long enough, you may see the dancer suddenly start spinning in [...]