Jastrow illusion

The Jastrow illusion is an optical illusion discovered by the American psychologist Joseph Jastrow in 1889. In this illustration, the two figures are identical, although the lower one appears to be larger. The short edge of the upper figure is compared to the long side of the lower one.^[1]

External links

• Reference to the illusion in World of Wonders; A Record of Things wonderful in Nature, Science and Art, Cassel, Petter & Galpin, London, 1873, p. 11.

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  With their left sides aligned, the lower figure appears larger

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  Shifting the upper figure to the right reveals their identical sizes

Wikimedia Commons has media related to Optical illusion.

References

Optical illusions List of optical illusions Afterimage Barberpole Bezold Blivet Café wall Cornsweet Delboeuf Ebbinghaus Ehrenstein Flash lag Fraser Grid Hering Jastrow Mach McCollough Müller-Lyer Necker Orbison Penrose: stairs triangle Peripheral drift Poggendorff Ponzo Rubin Sander Schroeder Ternus Vertical–horizontal White's Wundt Zöllner Related: Auditory  • Tactile  • Temporal  • Op art Ascending and Descending  • Waterfall Index of the eye Description Anatomy orbit neural pathways Physiology Phenomena appearance visual optical illusions proteins Development Disease Congenital Corneal dystrophy Neoplasms and cancer Other Symptoms and signs Treatment Procedures Drugs infection glaucoma and miosis mydriatics vascular