A ganzfeld (“whole field” in German) is an absolutely homogeneous region of space that covers an observer’s entire visual field. It can be of any single uniform wavelength and intensity.
The ganzfeld was first introduced in 1930 , by German Gestalt psychologist Wolfgang Metzger (1899–1979). Metzger was interested in elementary visual phenomena produced by impoverished visual conditions. The ganzfeld contains no luminance border, luminance ramp, or texture. The light reaching the eye is absolutely equal from all possible directions. Such conditions, called whiteout, can occur naturally during a snowstorm or in an airplane flying through clouds.
Perceptual Experience in the Ganzfeld
The typical visual phenomenology, for a person of normal sight, includes the emergence of “Eigengrau” , a uniform gray fog of indeterminate depth. This percept occurs regardless of the physical intensity and wavelength of the ganzfeld. Any color in a ganzfeld will eventually fade to...
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