Optična iluzija ali optična prevara je slika, ki jo možgani tolmačijo drugače kot dejansko izgleda. Razlika med resničnostjo in vtisom opazovalca nastane zaradi načina, kako možgani interpretirajo podatke, ki jih dobivajo od čutila za vid. Zato so optične iluzije v nevrobiologiji uporabna metoda za preučevanja delovanja možganov.

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  Pike
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  Obraz - vaza
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  Zajec - raca
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  Staro - mlado
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  Kanizsa trikotnik
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  Gradient
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• nemogoči predmet
• Trompe l'oeil
• M. C. Escher

• Eagleman, D.M. (2001) Visual Illusions and Neurobiology. Nature Reviews Neuroscience. 2(12): 920-6. (pdf) Arhivirano 2007-02-21 na Wayback Machine.
• Gregory Richard (1997) Knowledge in perception and illusion. Phil. Trans. R. Soc. Lond. B 352:1121-1128. (pdf)
• Purves D, Lotto B (2002) Why We See What We Do: An Empirical Theory of Vision. Sunderland, MA: Sinauer Associates.
• Purves D, Lotto RB, Nundy S (2002) Why We See What We Do. American Scientist 90 (3): 236-242.
• Purves D, Williams MS, Nundy S, Lotto RB (2004) Perceiving the intensity of light. Psychological Rev. Vol. 111: 142-158.
• Renier, L., Laloyaux, C., Collignon, O., Tranduy, D., Vanlierde, A., Bruyer, R., De Volder, A.G. (2005). The Ponzo illusion using auditory substitution of vision in sighted and early blind subjects. Perception, 34, 857–867.
• Renier, L., Bruyer, R., & De Volder, A. G. (2006). Vertical-horizontal illusion present for sighted but not early blind humans using auditory substitution of vision. Perception & Psychophysics, 68, 535–542.
• Yang Z, Purves D (2003) A statistical explanation of visual space. Nature Neurosci 6: 632-640.

Wikimedijina zbirka ponuja več predstavnostnega gradiva o temi: optična iluzija

• http://www.spletnenovice.net/opticne-iluzije.html Arhivirano 2008-08-03 na Wayback Machine.
• http://www.zbudise.net/blog/2008/01/opticne-iluzije-prevare/ Arhivirano 2008-08-20 na Wayback Machine.
• http://www.educa.fmf.uni-lj.si/izodel/sola/2001/ura/gramc/natasa/kocke.html
• Optical Illusions & Visual Phenomena by Michael Bach
• Optical Illusions: Computer Art in the Classroom Arhivirano 2007-01-10 na Wayback Machine.
• Project LITE Atlas of Visual Phenomena
• Akiyoshi's illusion pages Professor Akiyoshi KITAOKA's anomalous motion illusions
• "Spiral Or Not?" by Enrique Zeleny, The Wolfram Demonstrations Project.