Flicker-photometric spectral sensitivity in the presence of chromatic surrounds

Flicker-photometric spectral sensitivity is measured in the presence and absence of superimposed monochromatic surrounds. Although color appearance depends on surround wavelength, the shape of the flicker-spectral-sensitivity functions are unaffected. These findings indicate both a lack of cone-cone inhibition within the achromatic channel and independence of the achromatic and chromatic channels.