PSYC 2650 Chapter Notes - Chapter 3: Lateral Geniculate Nucleus, Retinal Ganglion Cell, Edge Detection
23 Nov 2017
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Document Summary
The visual system: vision is the dominant sense. Lens the transparent tissue located near the front of each eye that plays an important role in focusing the incoming light. Muscles control the degree of curvature of the lens, allowing the eye to form a sharp image on the retina. Light enters through the cornea: retina the light sensitive tissue that lines the back of the eyeball, cornea and lens refract the light rays to produce a sharply focused image on the retina. They are colour-blind and can distinguish different intensities of light: cones a photoreceptor that is able to discriminate hues and that has high acuity. Cones are concentrated in the retina"s fovea and become less frequent in the visual periphery. Perceive colour by comparing outputs from the cone types. Have another crucial function: acuity the ability to discern fine detail, much higher for cones than rods.
