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.

For the Visual Perception test, in fact, there are many ways, but practising optical illusions in a daily routine improves your depth perception regarding any visual illusion. These types of illusion ...

The Museum of Illusions opens today in Philadelphia, near Independence Mall. The relatively small space — about 5,000 square feet — features optical and spatial illusions designed to disrupt your eyes ...

Our perception of how large or small things are in the world is systematically influenced for how we perceive distance or depth. This is most famously shown by the Ponzo Illusion (discovered by Mario ...