PERHAPS it is difficult to demonstrate primary constancy scaling independently of the distortion illusions, but its effects are not limited to plane figures. For example, the apparent size of the Moon ...

Optical illusions play tricks on your brain and can make you see things that aren't really there, from static images swirling around the page to images that stay with you even after you look away.

FOR more than a century the various optico -geometric illusions have presented a challenge and been a source of controversy. Physiologists, philosophers and psychologists have produced a wide range of ...

Optical illusion? Have you ever been tricked into seeing something that is not really there? If yes, then you have already experienced the power of an optical illusion. The illusions play on the brain ...