How Good Is Your Eyesight? This Video Test Will Quickly Tell If You Need Glasses

Do you see Marilyn Monroe or Albert Einstein?
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Need glasses? Wear glasses? Think you have a perfect vision? Here's a pretty interesting and cool test that will let you know in a matter of seconds. It also explains the science of how they do it and it's all very interesting. 

The guys  behind the eyesight video also put together another one on brain tricks that's equally as fascinating.  Both are well worth a quick watch.