Take the test! This video could help you determine if you need glasses or a more powerful prescription.

You've probably seen the the photo featured in this asapSCIENCE video on Facebook in the last week. It's an image that shows Albert Einstien, if you're vision is good, or Marilyn Monroe, if you're vision isn't that great.

It's a good test for yourself, and even better, the guys at asapSCIENCE explain why people see a different image.