Abstract

Recordings of the human electroretinogram (an electrical response to light originating in the retina) are made while the eye is maintained at any one of three different levels of light adaptation. Conventional recording techniques and procedures are used. A single wave form displaying relative spectral sensitivity in agreement with the ICI photopic luminosity function is found throughout the middle and long wavelength portions of the spectrum, but short wavelengths are more effective in arousing electrical responses than would be predicted by the ICI curve. Although there is a considerable effect upon the magnitude of the electrical response, relative spectral sensitivity is not greatly affected by changes in degree of light adaptation. Two night-blind observers, however, were found to give a diminished response to blue stimulation.

© 1953 Optical Society of America

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