Optical Illusions can warp your ability to compare objects. This illusion of two circles is a  good illustration.Borrow money from pessimists-they don't expect it back.
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Circle Size Optical Illusion

Which red circle is larger?

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Surely one circle is larger in this optical illusion!

 

Scroll down for the answer and explanation.

 

 

 

They are both the same size.

Explanation

When we look at a two dimensional object, our eyes automatically try to convert it to three dimensions, because we live in a 3D world.

In this optical illusion, since the upper tire (gray circle) is smaller, we assume it is farther away than the lower tire. The inner white circles are the same size, but since the upper white circle covers, proportionally, more of the gray area, we assume it is larger.

Variations of this type of perspective optical illusion are very common.

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