Word: retina
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Dates: during 1920-1929
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While psychologists have been attempting to explain the eye in all its workings, Professor E. L. Chaffee A.M. '08 has been engaged in experiments on a single portion, the retina. The belief that the physical approach to an understanding of the eye will produce more rapid results than psychological experiments has actuated Professor Chaffee. Now after several years' aid from the Cancer Commission, he is enabled by the Milton awards to continue his experiments for another year...
...present time there are 26 theories of color vision held by scientists and physicians. Experiments which attempt a psychological explanation of the ocular mechanism have been very drawn out, and as yet not altogether conclusive. Progress in experimentation upon the retina of the eye with a sensitive vacuum tube amplifier connected to a recording galvanometer has been unusually rapid...
...Physical Colloquium to be held this afternoon in Room 3 of the Jefferson Physical Laboratory at 5 o'clock, Professor E. L. Chaffee will speak on "Electrical Response of the Retina to Stimulation by Light...
Perhaps the most interesting piece of apparatus in the building is that devised and set up by Professor Bovie and Professor E. L. Chaffee '08 for the measurement of the electrical changes induced in the retina of the eye by the action of light. The minute changes in electrical potential thus induced are amplified by special electrical apparatus to such a degree as to permit the measurement and recording of a reaction produced by the briefest exposure to a source of light equivalent to only one-millionth of a candle power...
...color-impulses were transmitted from the tiny "cones" on the retina to the brain has not previously been known. Professor Chaffee and Professor Bovie discovered that all impulses passing along the optic nerve are rhythmical, that they go in a series of extremely rapid pulsation's or separate impulses, and that the nature of this rhythm varies with the color of the light seen...