Delboeuf optical illusion of relative size perception. The blue circles are the same size and surrounded by an annulus. The left circles appear larger. Similar to Ebbinghaus illusion. Illustration. premium vector by Furian

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blue perspective circle illustration shape abstract black symbol visual optical education geometric experiment science size cyan illusion same psychology perception annulus relative illusory optical illusion optical illusions visual illusions DElboeuf same size delboeuf illusion

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