This is one of those eye tricks that makes your head explode!
It seems simple, just keep your eyes focused on the “X” in the middle.
But after a couple of faces appear, they slowly change into monstrous deformed faces!
How does it work?
It all has to do with your peripheral vision. Because the images are outside of our direct line of vision, it can be easy for our brains to get confused as to what we see.
The brain will combine the two images that are shown at the same time, along with the present picture with the previous image.