The face optical illusion was created by the Japanese experimental psychologist and optical illusion creator Akiyoshi Kitaoka. The illusion has nothing to do with colour but luminance. The ...

Similarly, an illusion created by Japanese psychologist Akiyoshi Kitaoka shows a gradient of pink to blue, with a small square traveling across the image. While the box appears to morph into ...

Using a computer model of the retina, researchers have been able to trace the cause of the expanding hole illusion ...