Optical illusions are more than just visual puzzles, they are powerful tests of how your brain processes information, detects ...

Our brain and eyes can play tricks on us—not least when it comes to the expanding hole illusion. A new computational model ...

Today’s optical illusion is challenging viewers to find a hidden "5" among a sea of "2s." The tricky pattern plays with human perception, making it hard to spot the odd number. Can you find it?

For those that love optical illusions – and a good explanation for the mind-bending properties of them – finding one you haven't seen before is a real treat. And that's just happened with this (I ...