est100 一些攝影(some photos): optical illusion, 錯視

Its creator Kokichi Sugihara only received second place in the annual Illusion of the Year contest for his design whereby a set of plastic squares appear to be circular when placed in front of a mirror
Optical illusion that had the internet flummoxed has been SOLVED | Daily Mail Online
Read more: http://www.dailymail.co.uk/news/article-3672044/Mind-bending-optical-illusion-internet-flummoxed-SOLVED.html#ixzz4DN9V6yPv
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