The process that fascinated audiences is called Natural Vision, a new twist on the old stereoscope and on MGM's 1937 two-reel "depthies.
Exercise equipment may be simply a pin which a patient watches while it is brought up to his nose, or a complex instrument like the synoptophore, third cousin to a stereoscope .
The old-fashioned stereoscope does what the living eyes do.
Museums' 'Treasures' currently on display CEDAR FALLS -- Mammoth teeth, Native American pottery and an early 20th century stereoscope are among the items on display as a part of a new exhibit, "Treasures: A Sampling of the UNI Museums Collection," on the first floor of the University of Northern Iowa's Rod Library until Feb. 28.
Nov. 27, 2013 - Waterloo-Cedar Falls Courier