The 9th annual Best Illusion of the Year Contest took place today, Monday May 13th, in the Naples Philharmonic Hall in Florida. Jun Ono, Akiyasu Tomoeda and Kokichi Sugihara, a team of mathematicians and illusion creators from Meiji University in Japan, took first prize for their "Rotation generated by translation illusion". See the best illusion of 2013 and all top 10 finalist illusions at http://illusionoftheyear.com.