The applicability of the Bunsen-Roscoe law to the components of the human electroretinogram was investigated under conditions of moderate light adaptation. Simultaneous <i>X</i> and <i>B</i> waves were obtained with red test stimulation and <i>A</i> and <i>B</i> waves with white test stimulation. Both response amplitude and implicit time were measured. The <i>A</i> and <i>X</i> waves were found to adhere to the Bunsen-Roscoe law and have relatively constant implicit times. The response amplitude of the <i>B</i> waves showed systematic departures from a simple Bunsen-Roscoe model and their implicit times varied with both stimulus duration and luminance.
WILLIAM R. BIERSDORF, "Luminance-Duration Relationships in the Light-Adapted Electroretinogram," J. Opt. Soc. Am. 48, 412-417 (1958)