Word: retina
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...have made him one of the great college teachers in the U.S. (TIME cover, May 6, 1966), has been primarily concerned with the eye's chemical makeup and reactions. Pursuing a "hunch" in the early 1930s, he discovered the presence of vitamin A in the retina, then went on to determine its presence and complex workings in the visual pigment. Now, he says with undiminished excitement, "we're on the edge of a whole series of new things" in knowledge of the eye, including a better explanation-perhaps eventually even a treatment-for color blindness...
...research that earned Wald the award began in Germany more than three decades ago, when he discovered Vitamin A in the retina. The retina is the membrane that receives the visual image from the lens and passes it on to the brain through the optic nerve...
Cryotherapy - literally, treatment by extreme cold - is particularly valuable in ophthalmology. It has already destroyed eye tumors, removed cataracts and sealed lesions in the retina. Now Dr. John Bellows of Northwestern University reports that it is highly effective in the treatment of a viral infection of the eye called herpetic keratitis...
...reading vision by looking straight at the sun. Under LSD they could do this for three or four minutes, hardly squinting and feeling no pain, so their eyes were wide open to the sun's infra-red rays, and the macula, the point of clearest vision in the retina, was badly burned. There is no effective treatment. Explained one boy: "I was holding a religious conversation with...
Concerning the validity of the Wood method, the only explanation of the increased speed is the greatly increased area of visual perception during fixation. On this point the traditionalists do not have to invent new tests. They can waive the results of scientific research which have proved the retina can bring only one inch of a printed line into clear focus...