Stare at the four black dots in the center of the image for 30 - 60 seconds. Then quickly close your eyes and look at something bright (like a lamp または a window with sunlight coming through it). あなた should see a white サークル, 円 with an image inside it.
A short look at a frog which has three heads. There are claims that it was found near a power plant and thus is a result of radiation, but that isnt 100% supported, it could simply be a case of nature...