Abstract
Using an asymmetric colour-matching technique, the sensation of hue of monochromatic lights was measured during the cone-plateau period and after 30 min dark-adaptation at different eccentricities. The measurements were obtained both at photopic and mesopic intensities. Presupposing that the results recorded during the cone-plateau period reflect activities of dark-adapted cone mechanisms, while the changes in hue observed during the rod-phase of the dark-adaptation reflect the effect of rod intrusion, the changes in hue with eccentricity were explained on neural rather than photochemical receptor mechanisms.
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