Abstract
The ERP of the human eye is studied for violet, blue, green, yellow and red flashes produced with absorption filters. For isoenergetic flashes the amplitude of R 1 and of R 2 is maximum for the green flash. The R 1R 2 ratio however increases progressively from 0 to 13 from violet to red flashes. The dark-adaptation half-time of R 2 is 210 sec for violet flashes, suggesting a dominant rod contribution for this color, 90 sec for red flashes, indicating a dominant cone contribution, and 135 sec for green flashes, corresponding to a mixed origin. The dark-adaptation half-time of R 1 is about 100 sec, whatever the wavelength of the flash, which suggests a cone origin for this wave in the human eye.
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