Scotopic vision
One calls scotopic vision (of the Greek skotos, darkness), the particular “form” which the vision under conditions of weak lighting takes. At the Man, the scotoptic vision is primarily ensured by the Bâtonnet S of the Rétine, which have a sensitivity to the important light (see Rhodopsine) but answer all the visible wavelengths (thus giving a perception black and white, or Panchromatique).
The maximum of sensitivity is reached, at the Man, after approximately 45 minutes of stay in the darkness, which corresponds to the time necessary to regenerate all the molecules of Rhodopsine in their active form. It is it should be noted that in reason of the distribution of the sticks on the retina, the maximum of sensitivity is not in the optical Axe (the Fovéa being only made up of cones) but at a few degrees of this one.
The sensitivity of the eye in scotopic vision is not the same one with all the wavelengths. The maximum of sensitivity is obtained for a wavelength of 507 nanometers.
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Category: Photometry Category: Vision
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