Optical illusion - Wikipedia
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![](https://upload.wikimedia.org/wikipedia/commons/thumb/b/be/Checker_shadow_illusion.svg/640px-Checker_shadow_illusion.svg.png)
![](https://static.wikia.nocookie.net/psychology/images/d/db/Grid_illusion.png/revision/latest/scale-to-width-down/256?cb=20060412053809)
Hermann grid illusion, Psychology Wiki
![](https://illusionsindex.org/images/illusions/muller-lyer/Mueller_lyer.png)
Müller-Lyer - The Illusions Index
Ambiguous image - Wikipedia
![](https://image.slidesharecdn.com/opticalillusionsp33-140127130927-phpapp01/85/optical-illusions-by-saina-1-320.jpg?cb=1668914631)
Optical Illusions By Saina
What is the difference between an optical illusion and an optical effect? - Quora
![](https://www.researchgate.net/publication/313803470/figure/fig2/AS:567084765925376@1512214952738/Two-sets-of-arrows-that-exhibit-the-Mueller-Lyer-optical-illusion-The-set-on-the-bottom.png)
Two sets of arrows that exhibit the Müller-Lyer optical illusion. The
![](https://live.staticflickr.com/3203/2839965752_9feeedd75f_z.jpg)
Op Art, This work of Op Art (en.wikipedia.org/wiki/Op_art) …
![](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Optical-illusion-checkerboard-bw.svg/1200px-Optical-illusion-checkerboard-bw.svg.png)
File:Optical-illusion-checkerboard-bw.svg - Wikipedia
![](https://upload.wikimedia.org/wikipedia/commons/1/18/Optical_illusion_meets_practical_joke.gif)
File:Optical illusion meets practical joke.gif - Wikipedia