Human electroretinogram responses to video displays, fluorescent lighting, and other high frequency sources.
Time-averaged human electroretinogram (ERG) responses were determined for several workplace visual stimuli which are temporally modulated at rates exceeding the perceptual critical fusion frequency (CFF). A clearly identifiable synchronous response was in evidence for a video display terminal (VDT) stimulus operating with a refresh rate as high as 76 Hz. A directly viewed fluorescent luminaire with controllable driving frequency elicited a synchronous response at rates as high as 145 Hz. In addition, an intense stimulus created by modulating the light from a slide projector produced responses at least as high as 162 Hz. The implications of these high-frequency responses are representing a potential basis for visual symptoms are discussed.
Lighting Research Group, Lawrence Berkeley Laboratory, Berkeley, California.
S M
SM
Berman
D S
DS
Greenhouse
I L
IL
Bailey
R D
RD
Clear
T W
TW
Raasch
D000328:Adult; D016288:Computer Terminals; D004596:Electroretinography; D005260:Female; D005425:Flicker Fusion / Q000502:physiology; D006801:Humans; D008029:Lighting; D008297:Male; D008875:Middle Aged; D010775:Photic Stimulation; D012160:Retina / Q000502:physiology*