Word: retina
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Dates: during 1920-1929
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...long been known that light passing through the lens of the eye makes an image on the retina at the back of the eyeball, as on a photographic plate, and that the impulse which then carries the message from the retina along the optic nerves to the brain is in the nature of an electrical disturbance. Such men as Walter and Jolly in England and Einthoven in Holland have been able to measure coughly the intensity of this electrical impulse. They have represented its intensity by a curve, and have found that when a light is flashed upon...