page_title: Pseudoscope
section_title: Effect
hierarchical_section_title: Pseudoscope / Effect
caption_attribution_description: English: Comfortable prismatic pseudoscope for long term experiment
context_page_description: 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.
context_section_description: Switching the two pictures in a standard stereoscope changes all the elevated parts into depressions, and vice versa. The pseudoscope also changes convex into concave, and high-relief into low-relief.
caption: Modern prismatic pseudoscope by Charles Whetstone's scheme
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