Optical illusions have to do with the way the brain interprets images.
It could be said that Aristotle was the first to discover (or at least to publish the discovery) how the brain deceives us. This was when, in the year 350 BC, he noticed that, after looking at a waterfall, focusing on fixed rocks seemed to move.
Later, in the 19th century, these issues were studied much more in depth, and hundreds of images began to appear that manage to trick the brain and make us see things that are not.
This image is one of them. Look at it carefully and tell me… What do you see?
Until now, they are just an angry man on the right, and a calm person on the left. But now tell me… What happens if you move a little away from the screen?
You’ve seen how everything turns upside down!
If you don’t see much change, it can also work by squinting… Or taking off your glasses, if you’re nearsighted.
This may sound crazy to you, but it’s not.
What happened to your brain?
This is actually an optical illusion developed by scientist Aude Oliva, from the Massachusetts Institute of Technology, and researcher Philippe G. Schyns, from the University of Glasgow.
In reality, the game is in the fine details of the image, which blur in the distance, leaving only the shadows and general shapes.
The illusion works because the face on the left is made up of an angry face at high spatial frequency, combined with a calm face at low spatial frequencies; and the one on the right, exactly the other way around.
As you zoom out or blur your view of details, the other layers of this composite image come to light.
What do you think? Did you expect to see something like this?
Share with your friends and have fun with their reaction!