Word: eye
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Dates: during 1930-1939
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...eastern edge erupted a whirling blot 16,000 miles across. Astronomers predicted magnetic storms and poor radio reception during the twelve days before the sun's rotation wheeled it out of sight, thought it might grow big enough to be seen with the unaided eye through smoked glass...
...Reading eyes grow blurred, skip words and lines. Heads ache, nerves twitch, stomachs misbehave. Students fail in their classes. Motorists and aviators misjudge distances, sometimes fatally. Many a person so afflicted has gone from one eye doctor to another, without relief. He was suffering from no ailment known to ophthalmology...
...Medicine, Dartmouth's Professor Adelbert Ames Jr. announced that his research department of physiological optics had found the ailment which may cause these disorders, had developed a means of correcting it. Though only about 1,000 cases had been observed, he estimated that 20% to 30% of all eye sufferers may be affected by a condition which he named aniseikonia. Said Professor Ames to the Manhattan doctors: "I feel that before aniseikonia was discovered we were somewhat in the position of the astronomers studying the solar system before all the important planets had been located. The effects...
Aniseikonia is Greek for "unequal images." When the sufferer looks at any object, the image reflected in the retina of one eye differs in size and shape from that in the other. The struggle of the brain's visual centre to fuse these two images brings aches, pains and frazzled nerves. Sometimes it cannot fuse them...
...Dartmouth researchers are not yet sure of aniseikonia's cause. They think it may be some malformation of the front part of the eye, or a larger number of light-sensitive cones in one retina than in the other. To detect the condition they have devised a complex instrument of peepholes, dots and lights, called the Ophthalmo-Eikonometer. To correct the condition they, and American Optical Co., have developed "iseikonic spectacles" with miniature telescope lenses to balance images...