Perspective Optical Illusion

Are these boxes all the same size?

See Another Random Optical Illusion

Scroll down for the answer and explanation.

Yes, they are.

Explanation

Yep, they really are exactly the same size. Hard to believe, isn't it? This optical illusion takes advantage of a three dimensional technique where all of the lines meet at one point off the edge of the canvas, thus making the mind see the picture as a 3D model of reality, rather than just lines on a screen. Since the right box appears to be the farthest away, our mind adjusts the size and sees it as the largest.

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