PSYCH261 Chapter Notes - Chapter 5: Retina Horizontal Cell, Retina, Trichromacy
23 Feb 2018
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People see an object when it reflects light that stimulates receptors that transmit information to the brian. One aspect of coding is which neurons are active. Impulses in certain neurons indicate light, whereas impulses in others indicate sound, touch, or other sensations. Muller described this insight as the law of specific nerve energies. Whatever excites a particular nerve establishes a special kind of energy unique to that nerve. Light enters the eye through an opening in the center of the iris called the pupil. Pupil is focused by the lens and cornea and projected onto the retina, the rear surface of the eye, which is lined with visual receptors. Light from the left side of the world strikes the right half of the retina, and vice versa. Light from above strikes the bottom half of the retina, and vice versa.
