Shape Distortion - Optical Illusions

List of Shape Distortion visual illusions:

• Ames Window

  The Ames window, also known as Ames trapezoid, is a trapezoidal shaped window that, when viewed frontally, looks exactly like a normal rectangular window viewed from an angle. The original experiment consists of this window, mounted on a metallic vertic..

• Café Wall Illusion

  The Café-wall illusion is a shape distortion illusion, which makes straight, parallel lines seem slanted. The name is owed to its discovery, in a public Café in St Michael's Hill (Bristol), by Dr. Richard Gregory. The cause of the illusion is apparentl..

• Ebbinghaus illusion

  The Ebbinghaus illusion was discovered by the German psychologist Hermann Ebbinghaus in the late 1800: the most famous version of this illusion is a couple of orange circles, one surrounded by large grey circles, the other by smaller grey circles. The r..

• Ehrenstein illusion

  The Ehrenstein illusion was first discovered by the German psychologist Walter Ehrenstein: the illusion consists of a series of concentric circles, in which an inscribed square looks curved, despite its side being perfectly parallel...

• Fraser spiral

  The Fraser spiral, also called false spiral and twisted cord illusion is a shape distortion visual illusion first discovered in 1908 by the British psychologist James Fraser. The image appears to be a spiral, while in reality it is a series of concentri..

• Hering Illusion

  The Hering illusion is a shape distortion visual illusion where two perfectly parallel and vertical lines, when drawed on a background of converging lines, appear to bow outwards. This effect was discovered in 1861 by the German physiologist Ewald Heri..

• Jastrow Illusion

  The Jastrow illusion is an example of illusory perception of length: in this case, two white stripes are shown in two different positions. In the second picture, the upper stripe seems longer than in the first, but it has only been moved and not modifie..

• Leaning Tower Illusion

  The leaning tower illusion is a clever angle-perception illusion that won the 2007 award for the Best Iillusion of the Year. It was discovered by Ali Yoonessi, Elena Gheorghiu and Frederick Kingdom in Mcgill University. The illusion consists of putting..

• Müller-Lyer Illusion

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