- Delboeuf illusion
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The two black circles are exactly the same size; however, the one on the left seems larger.
The Delboeuf illusion is an optical illusion of relative size perception. In the best-known version of the illusion, two circles of identical size have been placed near to each other and one is surrounded by an annulus; the surrounded circle then appears larger than the non-surrounded circle if the annulus is close, while appearing smaller than the non-surrounded circle if the annulus is distant. Recent work suggests it is caused by the same visual processes that cause the Ebbinghaus illusion[1]
References
- ^ Roberts B, Harris MG, Yates TA. (2005). "The roles of inducer size and distance in the Ebbinghaus illusion (Titchener circles).". Perception. 34 (7): 847–56. doi:10.1068/p5273. PMID 16124270.
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