optogram


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Related to optogram: Attogram

optogram

 [op´to-gram]
the visual image formed on the retina by bleaching of visual purple under the influence of light.

optogram 

Trace left on the retina by a retinal image due to the bleaching of rhodopsin.
References in periodicals archive ?
"The process of making an optogram is by blindfolding the person, rabbit or frog.
Optogram appears as a white image on a red or purple background.
He added that a good description of an optogram is that when you lean up against an object and you get that imprint on your skin, "it is not what you are thinking, it is not necessarily what you are seeing, but what your retina is receiving even if you were daydreaming."
It includes exhibits such as a very detailed recreation of what he imagines Kuhne's laboratory looked like, photos of rabbit optograms from 1975, various anatomically accurate sketches of eyes that have been manipulated to include small humanoids and many other exhibits that relate to eyes and the moments before death.
The rabbit optograms, Ogbourne told Gulf News, were made by Evangelos Alexandridis, a German scientist, who was approached by the police and asked if he could create optograms to help them solve a case after they read about Kuhne's original experiments.
It is not surprising that both Jules Claretie, in L'Accusateur, and Jules Verne, in Les Freres Kip, cite "le pourpre retinien"--retinal violet--as the motivating fact for their optogram mysteries.
Evans explains in his article about optogram fictions, the scientific experiments leading to the discovery of retinal violet were made available widely to the French public of the fin-de-siecle through various newspapers, journals, and popular gazettes (341-43).
"Optograms and Fiction: Photo in a Dead Man's Eye." Science-Fiction Studies, 1993.