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optography
From The Collaborative International Dictionary of English v.0.48:
Optography \Op*tog"ra*phy\, n. [Optic + -graphy.] (Physiol.)
The production of an optogram on the retina by the
photochemical action of light on the visual purple; the
fixation of an image in the eye. The object so photographed
shows white on a purple or red background. See {Visual
purple}, under Visual.
[1913 Webster]
