Word: lensed
(lookup in dictionary)
(lookup stats)
Dates: during 1930-1939
Sort By: most recent first
(reverse)
Not for amateur snapshotters are Fairchild cameras. An inexpensive model costs more than $1,000, and the most popular number sells for about $4,000. This model has one lens, is operated automatically by electricity. After the camera is set for the amount of overlap desired on successive pictures, the...
For about $13,000 one can buy a five-lens Fairchild for mapping larger areas. One lens shoots straight down, the other four at oblique angles. Distortion in scale caused by photographing at an angle is accurately corrected by a special instrument called a transforming printer. With one of the...
Another performance which fascinated the convention was Dr. Otto Barkan's operation for chronic glaucoma. In this disease the tiny drain called "canal of Schlemm" becomes clogged. It cannot carry away excess fluid which accumulates within the ball of the eye. Internal pressure eventually atrophies the optic nerve, causes...
...Contact lenses (TIME, Aug. 18, 1930) are thin glass shells which are fitted directly onto the eyeball, are almost invisible when in place. They are inconspicuous for actors and other vain persons, convenient for athletes. Since the curvature of the eye varies from one individual to another, a lucky fit is necessary for contact lenses to be worn for long periods without irritation. Hence although they have been known for 80 years, only about 3,000 have been successfully worn. For six years Dr. William Feinbloom, research fellow of Columbia University, labored on the problem of a lens made...
One way to make books available to the blind is to have readers with crisp, clear voices record them phonographically. At the disposal of the country's blind are some 5,000 books translated into Braille. But whether he listens to a recording or reads Braille, the blind person...