(definition) by Webster 1913 Wed Dec 22 1999 at 1:36:23

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.

 

© Webster 1913.

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