PSYCH 101 Lecture Notes - Lecture 7: Akinetopsia, Depth Perception, Moon Illusion
10 Dec 2017
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Document Summary
Sensation: the initial process of encoding environmental energy. Perception: the process of interpreting the information received from the senses. The cornea and the lens bend light from the environment to create an image on the retina (a layer of nerve cells at the back of the eye). The photoreceptors (the rods and cones) convert the light energy to electrical signals when light particles break apart their photopigments. The rods are larger, very sensitive to light, do not support color vision, and are used in low illumination. The cones are smaller, less sensitive to light, can be used to see colors, and are used in high illumination. Adaptation to the dark occurs as the photoreceptors regenerate their photopigments. Each retina is connected to the brain by an optic nerve. The optic nerves each consist of about one million ganglion cells. There are three different types of cones, and each one gives its greatest response to a different wavelength.
