PSY 3108 Lecture Notes - Lecture 16: Cytochrome C Oxidase, Color Constancy, Chromatic Adaptation
13 Dec 2016
School
Department
Course
Professor
Document Summary
Monochromacy: 1 cone provides no color due to univariance. Dichromacy provides crude color vision (red/green or blue/ yellow), trichromacy provides better color vision. More cones better color vison but at the expense of acuity (each receptor type would have low density and thus low acuity) In dichromacy, there is a single dimension of color vision. Info about wavelength can be obtained by comparing s to l cone. Long wavelength activates l conewith one photoreceptor type, two wavelengths of light might produce different outputs, or they might produce the same outputs. It depends on the intensity (number of photons) at each . Thus, a one-cone system can"t differentiate between intensity and wavelength differences. Rod monochromacy- very rare (1 in 3300) only rods no functioning cones. Poor visual acuity (20/150) and very sensitive to light (day blind) Cone monochromacy- very rare (incidence unknown), one type of cone plus rods. Generally normal vision but can discriminate no hues.
