PSYC 2220 Lecture Notes - Lecture 2: Retina, Ciliary Muscle, Optic Nerve
28 Sep 2017
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Document Summary
Focusing on the visual system, because the early processes of the visual system are very well understood compared to the other systems. Our vision depends upon our ability to detect electromagnetic radiation. Visible spectrum for human ranges from 400 to 700 nanometers. Most perceived light is reflected light waves. As the separation between the peaks get longer, they separate. we have a lower frequency wavelength on the top, and higher b) towards the bluer end of the spectrum. The way the world looks to us is determined by our sensory receptors. Rods and cones are the visual receptors in the retina that contain visual pigment. Optic nerve - that"s where the nerve is going from the eye of the brain. The cornea, which is fixed, accounts for about 80% of focusing. Accommodation results when ciliary muscles are tightened which causes the lens. Light rays pass through the lens more sharply and focus near objects on retina.
