Mark Rox calls himself a graffiti artist and most of his murals are located in Barcelona, Spain.(@pop.art.pov/Instagram) Optical illusions are all the rage on social ...

A stereogram optical illusion is a fascinating visual puzzle that hides a 3D image within a 2D pattern. At first glance, it appears to be a random collection of repeating designs or colourful dots.

To some, the picture shows a door and a concrete wall. To others, it appears to be flipped on its side containing a blue sky, sea and sandy beach. What do you see? To some, the picture shows a door ...

Optical illusions are older than you think. The first optical illusions date back to 20,000 BC and took the form of cave sculptings. Nowadays they are found all over the place – on screens, in books ...

Whether it’s green strawberries that look red, painted “three-dimensional” road bumps or that argument-provoking dress, we are suckers for a good optical illusion. And 29-year-old Sage Hansen, aka ...

Illusion is derived from the Latin verb illudere, which means to mock or trick. Optical illusion pictures are designed to trick the human mind and are regarded as one of the simplest tests to ...

Sometimes the eyes on an especially well-painted portrait will appear to follow you around the room, but Patrick Hughes' mind-boggling 3D art takes the concept to a whole other level. Hughes uses a ...