Summary
It was shown that natural illumination determines retinal adaptation. The moment of special onterest occurred at the change from daylight to twilight whsion while the person under observation was in natural conditions. Measurement of the retinal light sensitivity showed that the change from daylight to twilight vision was brought about by an increased sensitivity and activity of the rods which occurred after sunset.
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Anisimova, A.P. Adaptation of the visual apparatus to natural illumination. Bull Exp Biol Med 52, 762–764 (1961). https://doi.org/10.1007/BF00811628
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DOI: https://doi.org/10.1007/BF00811628