Block Contrast Optical IllusionIf at first you don't succeed, destroy all the evidence that you tried.
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Block Contrast Optical Illusion

Which block is larger?

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Perception is not always reality, as demonstrated in this optical illusion.


Scroll down for the answer and explanation.




They are the same size. Are you surprised?


The background or color surrounding an object affects its perceived size. A partial explanation for this optical illusion is that the framed object seems to grab more attention and therefore seems larger.

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