Pana Vue Auto Slide Viewer
Today competition in the form of digital media and the short attention spans of the View-Master’s target market has reduced their market share. Still it holds an appeal all its own.
Life is not flat. It moves through space and has shape. However, our understanding of this was limited until 1838 when Sir Charles Wheatstone published a paper on ‘binocular vision.’ His paper explained why we see things with perspective and depth and not flat like seen on a photo. He showed us that depth of vision occurs because our eyes see slightly different images when pointed at the same object. Our brain combines these images to create a composite that gives us perspective and depth. He built a device called a stereoscope to demonstrate this phenomenon.
The World in 3-D
In 1850, Sir David Brewster introduced a tabletop version of the stereoscope. The viewer would look through two magnifying lenses at images that were mounted side by side. Thus, the ‘flat’ photos looked dimensional. Then Dr. Oliver Wendell Holmes, and John Bates made stereo views mounted on a stiff card that could be attached to a hand-held viewer, making it cheaper and more accessible to the average person.
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