Mystery #2Tier 2-3physics / light
Why is the picture on your retina upside-down, yet the world looks the right way up?
Here is a strange fact: the picture focused onto the back of your eye is actually upside-down. The ground is at the top, the sky at the bottom. So why on earth does the world look perfectly the right way up to you?
Your guess
What's your hunch: if the picture in your eye is upside-down, why don't you see everything flipped?
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.