Abstract

The electrical flicker responses of the eye to stimulation at various wavelengths and luminances were recorded by means of a frequency analyzer in a manner suggested by Granit and Wirth. This instrument employs a tuned circuit to “lock in” on the stimulating frequency of the light flashes. Its tuning characteristics allow it to reject frequencies other than the one to which it is tuned, thus improving the signal-to-noise ratio. The results obtained were plotted against stimulus luminance, and criterion responses were used to plot spectral sensitivity points as a basis for comparison with the standard I.C.I. photopic sensitivity curve. The results point to the electrical responses of the eye as being more sensitive in the blue and red regions of the visible spectrum than their counterpart in psychophysical data. Various discrepancies and their possible sources are discussed. The use of the frequency analyzer in further electroretinographic research is evaluated, particularly with problems that depend on some frequency characteristic of the response.

© 1961 Optical Society of America

Flicker and Color Adaptation in the Human Electroretinogram

John C. Armington and William R. Biersdorf
J. Opt. Soc. Am. 46(6) 393-400 (1956)

Summation of Retinal Potentials

John C. Armington, Donald I. Tepas, Walter J. Kropfl, and Werner H. Hengst
J. Opt. Soc. Am. 51(8) 877-886 (1961)

Response of the Human Eye to Sudden Changes in the Wavelength of Stimulation

William R. Biersdorf and John C. Armington
J. Opt. Soc. Am. 47(3) 208-215 (1957)

On-Off Interaction in the Human Electroretinogram

C. I. Howarth
J. Opt. Soc. Am. 51(3) 345-352 (1961)

Electrical Responses of the Light-Adapted Eye*

John C. Armington
J. Opt. Soc. Am. 43(6) 450-456 (1953)