Optography
Pronunciation : Op*tog"ra*phy
Part of Speech : n.
Etymology : [Optic + -graphy.] (Physiol.)
Definition : Defn: 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.
Source : Webster's Unabridged Dictionary, 1913