Evidence has accumulated that rod activation under mesopic and scotopic light levels alters
visual perception and performance. Here we review the most recent developments in the …

The human retina contains three classes of cone photoreceptors each sensitive to different
portions of the visual spectrum: long (L), medium (M) and short (S) wavelengths. Color …

Using an asymmetric color matching technique, we measured the perceived changes that
occur in the saturation and hue of colored stimuli at different eccentricities within the central …

Hue-scaling functions are designed to characterize color appearance by assessing the
relative strength of the red versus green and blue versus yellow opponent sensations …

Hue perception has been shown to differ for the same stimulus when presented to the
temporal and the nasal areas of the retina. The present study investigated perceptual …

We measured the S-cone contrast threshold for stimuli of different size modulated along the
white− 90 deg direction in the isoluminant plane of DKL color space. The stimuli were …

The different hemifields in the retina are known to vary in photoreceptor density as well as in
the number of photoreceptors converging onto one ganglion cell. The effect of these …

Hue-scaling data were collected from three observers using the “4+ 1” color-naming
procedure for circular (0.25°–5°), monochromatic (440–660 nm) stimuli. Stimuli were …

The effects of intensity on chromatic perceptive field size were investigated along the
horizontal meridian at 10° temporal eccentricity by manipulating stimulus intensity from 0.3 …

Background: Studies investigating the effect of rods on unique hue loci in the peripheral
retina generally obtain measures at two time points associated with the dark adaptation …