An 'unsettling' optical illusion shows two squares which appear to be completely different shades of gray, but are actually ...

Optical illusions are images or designs that trick our eyes and brain. They make us see things that are not really there, or see movement where nothing is moving. These illusions happen because our ...

Optical illusions are no doubt interesting. At the same time, they often leave people baffled. Just like this optical illusion that may leave you scratching your head. What is even more interesting is ...

The optical illusion appears to show two grey squares with different shades, but they are actually exactly the same colour.