Benham’s disk is a simple illusion with a spinning circle, half black, half white streaked with short black lines. There is no color involved, and yet, when the disk spins, people can see bright ...

The picture is said to trick the brain into filling the blanks with the mind, creating an optimal illusion of solid colours to appear where there are none. 'This is a black and white photograph ...

AT FIRST glance, this photo looks like a normal coloured picture of a group of teenagers - but it is actually an optical illusion as it is black and white. London-based digital artist Stuart ...