This optical illusion could reveal if you need glasses or not.
If you are within a normal viewing distance from your screen and have good eyesight, you should see Albert Einstein in the picture, according to AsapSCIENCE.
However, according to the video, if you see Marilyn Monroe, you may need glasses.
If you are far away from your screen and you see Marilyn, no worries. Apparently that is normal.
But AsapSCIENCE says the further away you stand and can still see Einstein, then the better your eyes likely are.