Friday, April 30, 2010

pseudoscope


A pseudoscope is a binocular optical instrument that reverses depth perception. It is used to study human stereoscopic perception. Objects viewed through it appear inside out, for example: a box on a floor, would appear as a box shaped hole in the floor.

It typically uses sets of optical prisms, or periscopically arranged mirrors to swap the view of the left eye with that of the right eye.

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talk nineteen to the dozen

  to speak rapidly and without stopping