THIS mind-boggling optical illusion is bound to get you scratching your head – especially since only 9% of people can spot ...

Only 9% of people can correctly identify the colours in a black-and-white illusion with diagonal coloured lines. This visual ...

(Rhythm Rathi/CBC) Ji Hyang Ryu said it took her about two weeks — and two litres of black paint — to turn the white walls into an artistic illusion ... painted on the lines using a brush. " ...

This optical illusion is created to make your brain sweat and test your vision too. In the image, a Cat is hiding behind the horizontal black and white lines. Are you able to see that Cat?

They are based on geometric designs such as parallel lines, spirals, waves, circles and checkerboard patterns. Often these are produced in black and white or highly contrasting colours.

Now look closer. "Up close, you can see that the image is actually black and white. It has coloured lines on top of it. "Housed in London West End-based multi-sensory illusion attraction ...

Ji Hyang Ryu said it took her about two weeks — and two litres of black paint — to turn the white walls into an artistic ...