This Optical Illusion Will Tell You If You Need Glasses

Very cool.

You're about to take an eye exam, but there's no need to identify letters. Just look at the image below a normal viewing distance from your screen. About a foot away will do. 


Who do you see?

If you see Albert Einstein, you probably have pretty decent eyesight. If you see Marilyn Monroe, on the other hand, you may need glasses. 

Researchers at Massachusetts Institute of Technology created this hybrid image by merging a low spatial frequency image of Monroe with a high spatial frequency image of Einstein. Not sure what that means? Check out the image below. 

So, why does this work? 

"Depending on how well you're able to focus or pick up contrast, your eye will only pick out details," according to AsapSCIENCE. "Up close, we're generally able to pick up fine details like Einstein's moustache and wrinkles. But as the distance increases, or if your vision is poor and creates a more blurred image in the first place, your ability to pick up details fades away."

Learn more about why this works by watching the AsapSCIENCE video below:

This method isn't totally perfect, so be sure to see an eye doctor if you're concerned about your vision. 

(H/T: Elle)

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