Abstract
Spectral sensitivities of the red–green and yellow–blue opponent-color responses were determined under broadband light adaptation for the light-adaptation levels of 5 to 5000 Td. With changing light-adaptation level, the spectral-sensitivity functions of the opponent-color systems change in shape, especially in the short-wavelength region of the spectrum. The light-adaptation effect on the red–green responses can be ascribed to the changes at the cone receptor level, whereas the light-adaptation effect on the yellow–blue responses can be ascribed to the changes at two sites, i.e., at the cone receptor site and at the opponent site.
© 1985 Optical Society of America
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