An optical viewing instrument designed specifically to view anaglyphic images and create or enhance three-dimensional stereoscopic effects.
From anaglyph + -scope (from Greek skopein, to view). It's a device literally for 'viewing anaglyphs.'
This is basically a fancy name for a stereoscope or 3D viewer—basically goggles or a viewing box that displays anaglyphic images properly. Victorian inventors loved these devices for viewing stereoscopic photographs.
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