Journal ArticleDOI
Color vision in the peripheral retina. II. Hue and saturation
James Gordon,Israel Abramov +1 more
Reads0
Chats0
TLDR
From a modified form of color matching, it was concluded that the color deficiency in the periphery is more tritanlike than deutanlike, strengthened by the observation, that, for small peripheral targets, hues are generally apportioned between two hue categories and the change from one to the other is at about 580 nm.Abstract:
Hue and saturation of spectral lights were measured (direct scaling) in the fovea and at 45° in the periphery; all lights were of equal photopic retinal illuminance (1200 trolands). At each retinal location both large and small targets were used. As shown by previous studies, small peripheral targets appear desaturated and of uncertain hue, except long wavelengths which appear red. However, if target size is increased, saturation increases and a full range of hues is seen; the hue functions for large peripheral targets are comparable to foveal ones for very small targets. From a modified form of color matching, it was concluded that the color deficiency in the periphery is more tritanlike than deutanlike; this is strengthened by the observation that, for small peripheral targets, hues are generally apportioned between two hue categories and the change from one to the other is at about 580 nm.read more
Citations
More filters
Journal ArticleDOI
Cat and monkey retinal ganglion cells and their visual functional roles
Robert Shapley,V. Hugh Perry +1 more
TL;DR: Comparisons between cat and monkey ganglion cell classes reveal several important similarities between M cells and X cells, which are very sensitive to contrast.
Journal ArticleDOI
Functional anatomy of macaque striate cortex. III. Color
TL;DR: The DG results suggest that color sensitivity is also high in the lower-layer (layers 5 + 6) blobs, and that many layer 5 receptive fields are double-opponent, which supports the idea of a color-insensitive stream running from the magnocellular LGN layers through striate layers 4Ca and 4B to extrastriate areas MT and V3.
Journal ArticleDOI
Visual resolution, contrast sensitivity, and the cortical magnification factor
Veijo Virsu,J. Rovamo +1 more
TL;DR: The results indicated specificly that visual patterns can be made equally visible if they are scaled so that their calculated cortical representations become equivalent and the power law of spatial summation suggests the existence of a central integrator that pools the activity of cortical neurons.
Journal ArticleDOI
Organization of the Human Trichromatic Cone Mosaic
TL;DR: The results suggest that the assignment of L and M pigment, although highly irregular, is not a completely random process, and in the protan carrier, there was no evidence of clumping, perhaps as a result of cone migration during foveal development.
References
More filters
Journal ArticleDOI
Bezold–Brücke Hue Shift Measured by Color-Naming Technique*
Robert M. Boynton,James Gordon +1 more
TL;DR: In this article, three experiments on the Bezold-Brucke phenomenon are reported: an exact replication of Purdy's classic experiment, where the shift between 100 and 1000 trolands is investigated by direct matching in a steadily presented bipartite field.
Journal ArticleDOI
Colour Sensitivity of the Fovea Centralis
E. N. Willmer,W. D. Wright +1 more
TL;DR: A small central area of the fovea was unable to discriminate blue-green colours and, in other ways also, appeared to have the characteristics of the tritanopic form of colour-blindness.
Journal ArticleDOI
Hue-Wavelength Relation Measured by Color-Naming Method for Three Retinal Locations
TL;DR: A method of hue measurement has been applied to spectral stimuli delivered as flashes at 0 degrees, 20 degrees, and 40 degrees eccentricity in an otherwise dark field, and results showed a decrease in measured saturation but increasing reliability of the saturation measurements with increasing eccentricity.
Journal ArticleDOI
Colour Perception with the Peripheral Retina
J.D. Moreland,A. Cruz +1 more
TL;DR: The results indicate a progressive deterioration in colour perception with distance from the fovea: tending, under the conditions of the experiment, to dichromatism at 25°-30° and to monochromatismAt 40°–50°.
Journal ArticleDOI
Rod participation in the ‘blue’ mechanism and its effect on colour matching
TL;DR: An enquiry into why “rod colour” should be blue, together with an examination of the similarities and dissimilarities of rods and “blue cones”, leads to the further suggestion that rods and "blue cones" exist separately but share a neural pathway.