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Royal Society of Chemistry | Advancing excellence in the chemical sciences Free Science Videos and Lectures: Free Education Online is Possible! British Columbia Chemtrail Alert | Monitoring & tracking the criminal toxic chemical spraying of Beautiful British Columbia's land and people Science Daily Ganzfeld effect The ganzfeld effect (from German for “complete field”) or perceptual deprivation, is a phenomenon of perception caused by exposure to an unstructured, uniform stimulation field.[1] It has been most studied with vision by staring at an undifferentiated and uniform field of colour. The visual effect is described as the loss of vision as the brain cuts off the unchanging signal from the eyes. Ganzfeld induction in multiple senses is called multi-modal ganzfeld. A related effect is sensory deprivation. A flickering ganzfeld causes geometrical patterns and colors to appear. History[edit] In the 1930s, research by psychologist Wolfgang Metzger established that when subjects gazed into a featureless field of vision they consistently hallucinated and their electroencephalograms changed. The Ganzfeld effect is the result of the brain amplifying neural noise in order to look for the missing visual signals[according to whom?]. The Ganzfeld effect has been reported since ancient times. See also[edit]
Differences between viewing light and dark explain old optical illusion | National Academy of Sciences Astronomers and physicists starting with Galileo noticed centuries ago that when one looks at celestial objects — bright objects on a dark background — they appear to be too large. Now scientists have discovered the brain mechanisms underlying this effect. The findings are reported in the Proceedings of the National Academy of Sciences. Galileo was puzzled by how the appearance of the planets changed depending on whether one looked at them with the naked eye versus a telescope. Now neuroscientist Jens Kremkow at the State University of New York College of Optometry and his colleagues have found this illusion is due to the responses of neurons in the visual pathway and may originate in the very first cells of the pathway — the photoreceptors, which transform light into electricity.