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Dreamachines, Hallucinations, Charles Bonnet Syndrome & The 50 Year Old Question Hodological Science Answered
“I stand in the bright sunlight with closed eyes and face the sun. Then I move my outstretched, somewhat separated, fingers up and down in front of the eyes, so that they are alternately illuminated and shaded. In addition to the uniform yellow-red that one expects with closed eyes, there appear beautiful regular figures that are initially difficult to define but slowly become clearer. When we continue to move the fingers, the figure becomes more complex and fills the whole visual field. (Purkinje, 1819)