- 行业: Education
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The University of Illinois at Chicago (UIC) is a public university located on three urban campuses in Chicago. UIC ranks in the top 50 US institutions with strong research programs. The university boasts one of the largest medical schools in the US and operates Illinois’ major public medical center ...
All dichromats will accept a match between some spectral light and a white light. The wavelength of this spectral light is the neutral point for that dichromat. No trichromatic subject, including anomalous trichromats, will accept a match between a white light and any spectral light.
Industry:Physics
The region of the visual field in which stimuli will affect the neuron's level of activity.
Industry:Physics
Stability in the perceived color of a surface across changes in illumination and the consequent changes in the light reaching the eye.
Industry:Physics
Visual acuity as measured by the ability to discriminate high contrast shapes. The familiar Snellen eye chart which contains rows of letters each smaller than the one above provides one way of measuring Snellen acuity.
Industry:Physics
The perceived hues of monochromatic lights that do not change with intensity. There are three invariant hues: blue, green, and yellow. (See Bezold-Brücke hue shift. )
Industry:Physics
The central area of the retina. The fovea contains the densest concentration of photoreceptors (cones only) and displays other adaptations for high resolution vision.
Industry:Physics
The bundles of axons projecting from the lateral geniculate nucleus to primary visual cortex.
Industry:Physics
The light absorbing part of a photopigment. The photopigments contained in photoreceptors consist of two components: an opsin bound to a chromophore. The chromophore in human (and all mammalian) photopigments is retinal (a form of vitamin A). Upon absorbing a photon, retinal changes its conformation which results in its separation from the opsin group. This chemical change initiates the visual response. The differences in spectral sensitivity among the photopigments found in the different types of human photoreceptors are due to differences in their opsins.
Industry:Physics
The influence of the color of an area on the perceived color of an area viewed immediately afterward, e.g. afterimages.
Industry:Physics
Those areas of visual cortex lying outside primary visual cortex.
Industry:Physics
