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[size=0.875] Sean Levinson on The Science Of You
[size=1.125]If you see Marilyn Monroe in the picture below, you probably need glasses. [size=1.125]According to Daily Mail, students at the Massachusetts Institute of Technology created an optical illusion several years ago that also acts as a test to determine vision impairment. [size=1.125]The image features a blurry picture of Marilyn Monroe superimposed over a lightly drawn picture of Albert Einstein.  [size=1.125]A healthy pair of eyes will see only Albert Einstein if they view the picture from a normal distance. [size=1.125]Marilyn Monroe, on the other hand, will be seen if your eyes process close-up images as if they’re much farther away. [size=1.125]Healthy eyes can therefore only see Marilyn Monroe by backing away from the screen:  [size=1.125]The illusion shows that high spatial frequency features like the fine lines of Einstein are visible from up close whereas blurry, low spatial frequency features can only be seen from a distance.
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