Perimetry of critical flicker frequency in human rod and cone vision.
Photopic critical flicker frequency (CFF) to green and yellow-red targets became independent of visual field location when the decrease in the density of retinal ganglion cells and increase in their receptive-field size towards the retinal periphery were compensated for by increasing stimulus area in inverse proportion to the human cortical magnification factor squared (M-scaling) and by reducing stimulus luminance in inverse proportion to Ricco's area (F-scaling). In mesopic and scotopic vision CFF to green targets increased monotonically with eccentricity despite MF-scaling. Instead, CFF to MF-scaled yellow-red targets that predominantly stimulated cones was independent of eccentricity at all luminance levels tested.
D000328:Adult; D003118:Color Perception / Q000502:physiology; D005425:Flicker Fusion / Q000502:physiology*; D006801:Humans; D008027:Light; D008875:Middle Aged; D010364:Pattern Recognition, Visual / Q000502:physiology; D010783:Photometry; D010786:Photoreceptor Cells / Q000502:physiology*; D012165:Retinal Ganglion Cells / Q000502:physiology; D014794:Visual Fields