title: A tetrachromatic display for the spatiotemporal control of rod and cone stimulation.
abstract: We present an apparatus that allows independent stimulation of rods and short (S)-, middle (M)-, and long (L)-wavelength-sensitive cones. Previously presented devices allow rod and cone stimulation independently, but only for a spatially invariant stimulus design (Pokorny, Smithson, & Quinlan, 2004; Sun, Pokorny, & Smith, 2001b). We overcame this limitation by using two spectrally filtered projectors with overlapping projections. This approach allows independent rod and cone stimulation in a dynamic two-dimensional scene with appropriate resolution in the spatial, temporal, and receptor domains. Modulation depths were ±15% for M-cones and L-cones, ±20% for rods, and ±50% for S-cones, all with respect to an equal-energy mesopic background at 3.4 cd/m2. Validation was provided by radiometric measures and behavioral data from two trichromats, one protanope, one deuteranope, and one night-blind observer.
authors: Florian S
authors: FS
authors: Bayer
authors: Vivian C
authors: VC
authors: Paulun
authors: David
authors: D
authors: Weiss
authors: Karl R
authors: KR
authors: Gegenfurtner
mesh_terms: D000293:Adolescent; D000328:Adult; D002755:Choice Behavior; D055253:Color Vision / Q000502:physiology; D015350:Contrast Sensitivity / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D010775:Photic Stimulation / Q000379:methods*; D017949:Retinal Cone Photoreceptor Cells / Q000502:physiology / Q000528:radiation effects*; D017948:Retinal Rod Photoreceptor Cells / Q000502:physiology / Q000528:radiation effects*; D055815:Young Adult