We present a display-based visual stimulator for psychophysical and electrophysiological visual sensitivity measurements. The stimulator offers various psychophysical visual stimuli and transfers the signals from external devices along with the stimulation signals to an electrophysiological recorder. As an experimental demonstration, we perform a visual sensitivity experiment in the mesopic vision range by using the display-based stimulator. The intensity of the steady-state visual evoked potential is observed to correlate with the luminance of the flickering visual stimulation. For the psychophysically determined detection thresholds, we determine the mesopic luminance, showing agreement with the perceived brightness within the uncertainty of the luminance measurement.
© 2012 Optical Society of Korea
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(330.1720) Vision, color, and visual optics : Color vision
(330.5380) Vision, color, and visual optics : Physiology
(330.5510) Vision, color, and visual optics : Psychophysics
Original Manuscript: April 6, 2012
Revised Manuscript: May 25, 2012
Manuscript Accepted: May 31, 2012
Published: June 25, 2012
Ji-Soo Hwang, Seung-Nam Park, Cheol-Min Park, Geun-Woo Lee, and Ki-Seong Kim, "A Display-based Visual Stimulator for Psychophysical and Electrophysiological Color Sensitivity Measurements," J. Opt. Soc. Korea 16, 145-150 (2012)
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