Chromatic Response Mechanisms in the Human Fovea as Measured by Threshold Spectral Sensitivity

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Science  27 Apr 1962:
Vol. 136, Issue 3513, pp. 317-318
DOI: 10.1126/science.136.3513.317


Threshold sensitivity was measured with 40-degree surrounds of 5.3 and 800 trolands of white, and 509, 580, and 690 mµ spectral light. With the brighter white surround there appeared peaks at 550, and 570 and a shoulder at 600 mµ. These were selectively eliminated by the spectral surrounds.