LETTER TO THE EDITOR. INDEPENDENCE AND INTERDEPENDENCE IN ON AND OFF VISUAL STIMULI,
EYE RESEARCH FOUNDATION BETHESDA MD
Pagination or Media Count:
It is concluded that the ON instant represents a discrete stimulus, and the OFF instant represents a new and also discrete stimulus. The plateaux of intensity between ON and OFF, between OFF and ON, or, as in these studies, between ON and ON, or OFF and OFF, are periods during which adaptation can be developed. Flicker stimulation therefore becomes a mutual interaction between OFF and ON under conditions in which the OFF-ON interaction inhibits response of both stimuli, perhaps because the plateau period is too short, at the ambient luminance, to permit adaptation between the stimuli. Such an hypothesis has two advantages 1 the sequellae of the corneal ERG response are presented in a very simple interpretation, although perhaps oversimplified 2 the critical flicker frequency can be interpreted wholly as a reflection of retinal adaptation that is, as a measure of either retinal metabolism or retinal health.