Word: lensed
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Few surgical operations are older than those performed for cataract of the eye. As early as about 2000 B.C., the Code of Hammurabi ordained: "If a physician . . . open a tumor of the eye with a bronze lancet and save [the patient's] sight, he shall have ten shekels of...
Sweet Vapors. The half-legendary Indian surgeon Susruta,* says Dr. Kirby, was able to operate successfully for cataract by piercing the eyeball and pushing the clouded lens down out of the light rays' path. This partly restored the patient's sight, though not his power to focus. Susruta...
A lens focuses the scene being viewed on the front side of the photoconductor. A slender beam of electrons from an "electron gun" scans the rear side of the photo-conductor. When the electrons hit a brightly lighted area, a lot of them pass through. When they hit dark parts...
This huge telescope is housed in the largest building at Oak Ridge, a dome-shaped shell with rotating walls. Electric power, stepped up by generators, operates the instrument and moves the walls along their built in track. Since all the operations can be directed by a set of pushbuttons attached...
...pictures, seldom for direct viewing. The newest of these is the Jewett Memorial telescope, which was completed just after the war; its whole building revolves at the push of a button. With all this modern electric equipment around them, however, observers still freeze throughout the winter. Since the sensitive lenses cannot take quick temperature changes, and have to stay in the open all night for use, the buildings are never heated; students must supply themselves with fur-lined gloves and woolen caps on cold winter nights...