The Use of Flicker Electroretinography in the Human Eye

Abstract

Although single flash ERG and introspective fusion frequency determinations have achieved a fair prominence as t o d s in clinical and investigative work on the retinae, the use of flicker ERG clinically on the human eye with different intensities of illumination has not been preyiously reported. Observations upon man and animals indicate that this method can yield much information not only concerning numerical fusion frequencies, but other characteristics of the retinal response.

The Use of Flicker Electroretinography in the Human Eye

“…The flicker ERGS obtained in these cases of primary total colour-blindness were thus throughout of a purely scotopic type and did not differ qualitatively from the case described by Dodt & Wadensten (1952). As pointed out earlier (Wadensten 1954), a flicker response can sometimes be observed even at the highest intensities of the stimulus light, Fig.…”

“…Dodt & Wadensten (1952& Wadensten ( , 1954) established a definite flicker ERG in a case where the single-flash ERG was extinguished for stimulus lights of 20 and 80 lux and consisted only of a very small negative wave at 800 lux. The fact that this was by no means a unique condition appears from the results in a number of similar cases.…”

Stimulus Duration and the Oscillatory Potentials of the Human Electroretinogram

“…By comparison with the rods, the cone receptor system is specialized for resolution of stimuli in time as demonstrated by higher CFF of cones. This has been shown both psychophysically and electroretinographically (Babel & Monnier 1949, Dodt & Wadensten 1954. The cone system also shows less convergence of receptor -bipolar-ganglion cells (Polyak 1941, Kolb 1970 in comparison with rods.…”