Senescent changes in parafoveal color appearance: saturation as a function of stimulus area.

The chromatic content (saturation) of monochromatic stimuli (480, 505, 577, and 650 nm) was scaled as a function of field size at three different retinal locations by 58 observers ranging from 18 to 83 yr of age. The different retinal locations (6 deg nasal, 2.5 deg inferior and 6 deg temporal eccentricity) were chosen according to anatomical studies demonstrating different degrees of senescent losses of cones or ganglion cells. Nine field sizes were tested, ranging from 0.0096 to 0.96 deg in diameter. The subjects used a percentage scale to judge the saturation of the flashed stimulus presentations (2 s on, 5 s off). The data analysis demonstrated that older observers require larger field sizes than younger observers to perceive hue as well as larger field sizes to reach the same level of scaled saturation. The spatial dependency of color appearance for younger and older observers was not correlated with senescent losses in retinal cells reported for the different retinal locations. The data were modeled by using an impulse-response function (i.e., Naka-Rushton equation) so that perceptive fields could be compared to electrophysiological measures of receptive fields or dendritic fields of retinal and cortical cells.

[1]  C. Curcio,et al.  Aging of the human photoreceptor mosaic: evidence for selective vulnerability of rods in central retina. , 1993, Investigative ophthalmology & visual science.

[2]  I Abramov,et al.  Color vision in the peripheral retina. II. Hue and saturation. , 1977, Journal of the Optical Society of America.

[3]  J S Werner,et al.  Loci of spectral unique hues throughout the life span. , 1990, Journal of the Optical Society of America. A, Optics and image science.

[4]  C. M. Cicerone,et al.  The relative numbers of long-wavelength-sensitive to middle-wavelength-sensitive cones in the human fovea centralis , 1989, Vision Research.

[5]  D. Dacey,et al.  Dendritic field size and morphology of midget and parasol ganglion cells of the human retina. , 1992, Proceedings of the National Academy of Sciences of the United States of America.

[6]  C. Curcio,et al.  Retinal ganglion cells in Alzheimer's disease and aging , 1993, Annals of neurology.

[7]  K. Naka,et al.  S‐potentials from colour units in the retina of fish (Cyprinidae) , 1966, The Journal of physiology.

[8]  G Westheimer,et al.  The Maxwellian view. , 1966, Vision research.

[9]  I. Abramov,et al.  Color appearance in the peripheral retina: effects of stimulus size. , 1991, Journal of the Optical Society of America. A, Optics and image science.

[10]  A. Nagy,et al.  Red-green color discrimination as a function of stimulus field size in peripheral vision. , 1993, Journal of the Optical Society of America. A, Optics and image science.

[11]  D. Dacey.  Morphology of a small-field bistratified ganglion cell type in the macaque and human retina , 1993, Visual Neuroscience.

[12]  K. Naka,et al.  S‐potentials from luminosity units in the retina of fish (Cyprinidae) , 1966, The Journal of physiology.

[13]  Naoya Yokoyama,et al.  Neural Coding of Color , 2004 .

[14]  P. Kaiser,et al.  Saturation of spectral lights , 1976 .

[15]  R. Desimone,et al.  Visual properties of neurons in area V4 of the macaque: sensitivity to stimulus form. , 1987, Journal of neurophysiology.

[16]  G. Fowler,et al.  Rod influence on hue-scaling functions , 1998, Vision Research.

[17]  B. Schefrin,et al.  Age-related changes in the color appearance of boradband surfaces , 1993 .

[18]  John S. Werner,et al.  Age-related changes in the color appearance of broadband surfaces , 1993 .

[19]  E. Switkes,et al.  Functional anatomy of macaque striate cortex. II. Retinotopic organization , 1988, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[20]  John S. Werner,et al.  Spatial summation in human cone mechanisms from 0° to 20° in the superior retina , 2000 .

[21]  J. Moreland,et al.  Peripheral Colour Vision , 1972 .

[22]  J S Werner,et al.  Aging and the saturation of colors. 2. Scaling of color appearance. , 1999, Journal of the Optical Society of America. A, Optics, image science, and vision.

[23]  E. Switkes,et al.  Functional anatomy of macaque striate cortex. III. Color , 1988, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[24]  J. Krüger,et al.  Stimulus dependent colour specificity of monkey lateral geniculate neurones , 1977, Experimental Brain Research.

[25]  B. Stabell,et al.  Wavelength discrimination of peripheral cones and its change with rod intrusion , 1977, Vision Research.

[26]  J J Koenderink,et al.  Spectral sensitivity and wavelength discrimination of the human peripheral visual field. , 1984, Journal of the Optical Society of America. A, Optics and image science.

[27]  R. L. Valois,et al.  Hue Scaling of Isoluminant and Cone-specific Lights , 1997, Vision Research.

[28]  R. Shapley,et al.  Cat and monkey retinal ganglion cells and their visual functional roles , 1986, Trends in Neurosciences.

[29]  G. Rand,et al.  Chromatic thresholds of sensation from center to periphery of the retina and their bearing on color theory: Part I. , 1919 .

[30]  A. Nagy,et al.  Red-green color discrimination in peripheral vision , 1993, Vision Research.

[31]  Mary A. Johnson,et al.  Color vision in the peripheral retina. , 1986 .