Ganzfeld (
German for "complete field") is a particular phenomenon of
visual perception
Visual perception is the ability to detect light and use it to form an image of the surrounding Biophysical environment, environment. Photodetection without image formation is classified as ''light sensing''. In most vertebrates, visual percept ...
. The term is used most commonly in relationship to:
*
Ganzfeld effect, the psychological result of staring at an actual Ganzfeld
*
Ganzfeld experiment, a technique in parapsychology
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