“The Contrast Asynchrony” optical illusion has been created by ShapiroLab enthusiasts. While the effect has been known for some time, variations of images, applications and games that give the best insight have been popping out regularly. This variation is surely my favorite. It is very easy to convince yourselves that the center disks are identical in shape and color – you can prove this by simply clicking on the “add/remove” button. The effect produced here is called “perceptual paradox“. The disks appear to modulate out of phase and get light and dark at different moments. Experiment with the FLASH application below!
