Look at the photo above. Really look at it.
Do you see Albert Einstein or Marilyn Monroe?
If you see Einstein, congrats: Your eyesight is pretty good. But if you see Monroe (stop squinting!), you may need to get yourself a pair of glasses.
What is this sorcery, you ask?
As the team from AsapSCIENCE details in the video below, this is what's called a "hybrid image" — which contains a high spatial frequency image of Einstein layered on top of a low spatial frequency image of Monroe.
If you're close to the screen or have good eyesight, your eyes can pick up the finer details of an image, like Einstein's mustache and wrinkles. But if you back up from the screen, or if your eyesight isn't great, you can only process the general shapes of an image, like Monroe's hair and smile.
Seriously: You can test this out for yourself right now. Walk away from the screen. Keep going. Can you see Monroe yet? Take off your glasses or take out your contacts. If you still can't see her, well, you've been blessed with superhuman eyesight.
While this may not be as polarizing as #TheDress debate, it's still cool to learn a little bit about how our brain processes images.
If, however, this video does go viral, what should we call it? #AlbertMonroe? #MarilynEinstein?