Dvorine Pseudo-Isochromatic Plates
Maker
Harcourt, Brace & World (estab. 1960)
Description
The Dvorine Pseudo-Isochromatic Plates consist of a set of plates in a folder, housed in a box, that have kaleidoscopic images of multicoloured dots of varying sizes with a faint image (numbers and letters), hidden within the plate, used to test for colourblindness.
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