THIS mind-boggling illusion used to demonstrate what people with colourblindness can see has blown the minds of social media users. All you have to do is stare at the middle of the green, yellow, ...

19. The union flag optical illusion Observing the world in all its colourful glory is something many of us take for granted. But how different do things look if you’re colour blind? In a video ...

A moth found in northern Australia and South-East Asia has an astonishing camouflage trick: it creates an optical illusion to look like a three-dimensional leaf, complete with a raised midrib ...

An optical illusion is a fascinating visual phenomenon where the brain perceives an image differently from reality. These illusions play tricks on our eyes, making objects appear distorted ...

4. Mach band While some optical illusions dupe our brain into seeing motion, others like the Mach bands illusion deceive us into seeing imaginary shades. The horizontal bar in the image above may ...