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Anthony G. Robson is a researcher in visual electrophysiology and the first author of the 2022 standard for full-field clinical electroretinography. The document specifies stimulus conditions, recording methods and reporting practices for measuring the retina's summed response to diffuse flashes of light. A shared protocol makes recordings from different laboratories more comparable.^[ref]

The controlled background state is part of the measurement. Responses recorded after dark adaptation and under light adaptation probe different combinations of retinal activity; changing the adaptation condition can change a waveform even when the underlying tissue is unchanged. Specifying adaptation, flash conditions and electrodes therefore helps distinguish a physiological difference from a procedural difference. The standard addresses generalized retinal function; a summed response does not directly locate every abnormality within an individual retinal cell.^[ref]

Selig Hecht was a researcher in the physiology of vision who measured how sensitivity changes during light adaptation and dark adaptation. In a 1937 study, Selig Hecht and colleagues varied prior illumination and then measured recovery of the human eye's ability to detect faint test lights.^[ref]

The recovery curve depended on the preceding exposure. Under sufficiently bright preadaptation, an early phase associated with cone cells was followed by a slower phase associated with rod cells; other exposure conditions did not reveal both phases in the same way.^[ref]

This makes prior conditions part of the experiment. Two observers tested after the same time in darkness need not be in comparable states if their preceding illumination differed. A curve measured over time reveals changes that a single final sensitivity measurement would hide. The historical illumination unit called photons in this paper should not be interpreted as a count of individually detected photons.

Researcher in photosynthesis. Bellafiore and collaborators showed that STN7 kinase is required for state transitions and light adaptation, connecting a chloroplast kinase with redistribution of excitation between photosystems.^[ref]