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rushintuit
sage
Reged: 04/01/06
Posts: 263
Loc: Farpoint Observatory
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Re: dark adaptation
08/05/06 09:13 PM Attachment (15 downloads)
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"It takes about 2 hours for your rhodopsin (visual purple) to regenerate"
From Wikipedia, the free encyclopedia:
Rhodopsin, also known as visual purple, is expressed in vertebrate photoreceptor cells. It is a pigment of the retina that is responsible for both the formation of the photoreceptor cells and the first events in the perception of light. Rhodopsins belong to the class of G-protein coupled receptors. It is the chemical that allows night-vision, and is extremely sensitive to light. Exposed to white light, the pigment immediately bleaches, and it takes about 30 minutes to regenerate fully in humans.
http://en.wikipedia.org/wiki/Rhodopsin
The 30 minute regeneration scenario seems more in line with personal experience.
Attatched photo: A rhodopsin molecule (yellow) in the cell membrane (blue). Retinal is shown in orange.
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/// Stellarvue SV102ED /// Nikon 12x50 /// Fujinon 16x70 /// SkyTools 2 /// The Desktop Universe All Sky CCD Mosaic In Monochrome Mode ///
Edited by EdZ (08/10/06 09:25 AM)
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