Mystery #3Tier 2-3vision / perception
Why do optical illusions fool your eyes?
Look at a famous illusion where two patches of grey sit on a checkerboard, one in shadow, one in light. They look obviously different, one clearly darker than the other. But cover everything around them and they are the EXACT same grey. Your eyes are working perfectly. The light hitting them is real. So how can what you 'see' be flat-out wrong?
Your guess
What's your guess about why optical illusions trick us, even when our eyes are healthy?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
Make a guess to unlock the hints and the answer.