最迷惑人的20幅图画 Optical Illusions - the top 20

This optical illusion, the Cafe Wall Illusion, was first discovered by Dr Richard Gregory who observed an anomaly in the way that the tiles of a wall in his local cafe in Bristol displayed. The horizontal lines appear to be bent, although they in fact parallel straight horizonal lines. The effect only works if the tiles have a border (in this case grey).

看得出这些都是些平行的线条吗？