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.

Log in or register to write something here or to contact authors.