The Leaning Tower Optical Illusion

The Leaning Tower Optical Illusion created by Fredrick Kingdom, Ali Yoonessi and Elena Gheorghin. It is a fairly simple illusion in that its actually the exact same image in both pictures yet the one on the right appears to be leaning;

The leaning illusion is caused by the eyes perception of the outside lines of the towers. Since the towers outside lines are parrallel, your visual system perceives them as diverging as they rise this is what causes the perception of the leaning tower.

As a side note i found that if you cross your eyes so there is three images of the towers when the middle one if formed it looks 3D and almost pops out at you! try it!

Leaning Towers Illusion

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