McIntosh Stereopticon slides were produced from the the 1920s until the 1980s.
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stereopticon
Stereopticon
stereopticon
Stereopticon
This ROOT-WORD is STEREO which means SOLID. It comes from the Greek stereo which means a solid body. Years ago the Root STEREO was mainly associated with a STEREOpticon which is an optical instrument for throwing pictures on a screen. Today, with the advent of motion pictures and the STEREOscope, and its use with a phonograph, illustrated lectures are given in the classroom with great profit to the student.
McIntosh Stereoptican was taken over by "Jerry" Siakel in the 1920's and later run by his son "Dick." The company closed it's doors in the 1980's as computer graphics took over thetraditional Kodak film niche. The studio was located at 549 West Randolph in the Knight Building for over 60 years. Jerry died in 1997 at the age of 101.
The biggest difference will be the challenge of depth perception. The stereopticon type of ability that two eyes have enable the brain to better judge distance. This is a big handicap, one which improves with time as the brain adjusts to using other clues to determine depth and distance. It also gives them a larger blind spot or put another way, a smaller field of vision.
In the era before movies, the magic lantern was the only way to show moving pictures. It was a device that was similar in some ways to a slide projector: it could display pictures, animated images, and even illustrated lyrics to popular songs. An early version existed in the 1600s, but the magic lantern (sometimes called a stereopticon) became very popular in the late 1800s as projection techniques improved, allowing more interesting and colorful slides to be displayed and enjoyed. I enclose a link to a historical society that preserves these slides.
It means two. It is most famililar in the word "stereophonic" which means "two sounds", and means a music player with two speakers. Sometimes a music player (especially when they played LP discs) was called a "stereo" as an abbreviation for stereophonic. The word was also abbreviated in its adjective form--e.g. "There's a great stereo effect in Led Zeppelin's Whole Lotta Love." There are also uses of the prefix where they are not talking about sound. A stereopticon was a device with two photographs of the same thing, one for each eye. When viewed through the viewer, they had a 3-D effect.