The Spiral Tornado Illusion — Look at this spinning tornado for a few minutes and then look away at a strong pattern. Watch the pattern twirl and buzz! This is known as the spiral aftereffect. Also, check out this larger version. It also works very effectively.
With the Spinning Dancer Illusion, the dancer appears to sometimes spin clockwise and then sometimes shift to spinning counter-clockwise. At first you might only see the dancer spinning in one direction, but at some point your vision will shift and you will begin to see the dancer spin in the other direction. When that happens, […]