Abstract
IN a previous letter1, it was suggested that differences in the luminosity curves are caused by varying numbers of receptors. In order to find new evidence for this, it seemed worth while to study the intensity discrimination and the visual acuity of the three sets of receptors, as these functions depend upon the number of elements. The blue apparatus was studied first. Two methods were used:
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References
de Vries, Hl., Nature, 157, 736 (1946).
de Vries, Hl., J. Opt. Soc. Amer., 36 (Feb. 1946).
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DE VRIES, H. Mechanism of Colour Discrimination and a New Type of Colour Blindness. Nature 157, 804–805 (1946). https://doi.org/10.1038/157804c0
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DOI: https://doi.org/10.1038/157804c0
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