Optical illusions occur because of the way our brain processes visual information. The human vision system is complex but not ...

Our new optical illusion challenges viewers to spot the hidden "44" among rows of "46" and "49," but only 1 per cent with ...

An optical illusion showing an office scene puzzled users on Facebook as they struggled to count how many people were actually in the room. Optical illusions are a fascinating type of brain teaser ...

Can you count all the squares in this viral optical illusion?(Facebook/Minion Quotes) (Also read: Optical illusion: You've got superhuman eyesight if you can count all the hidden dogs correctly ...

The goal of optical illusion challenges is to try to find what really isn't there or is just hiding in plain sight. And today we have a fun, exciting, and challenging optical illusion waiting for you.

A woman watches an optical illusion at the Optikpark in Rathenow, eastern Germany (DDP/AFP via Getty Images) In the new research, scientists tested whether specific visual expertise and training ...