Troxler effect

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The fading of an image in peripheral vision when a central stimulus is fixated with a steady gaze while attention is shifted to the peripheral stimulus. Movement of the peripheral stimulus normally prevents it from fading. Also called Troxler fading. [Named after the Swiss-German philosopher and physician Ignaz Paul Vitalis Troxler (1780–1866) who first reported it in 1804]

Subjects: Psychology.

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