PSYC-275 Study Guide - Midterm Guide: Far-Sightedness, Sclera, Photon
3 Mar 2017
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In the light: ganglion cells have 2 channels. Answer sheet: a photon is the smallest possible unit of light energy. 760nm: wavelength: plays an important role in the perception of colour. Pupil: allows different amounts of light into the eye (larger to let more light in, smaller to reduce light exposure) Optic nerve: one of the cranial nerves, carries signals out of eye toward the brain to be interpreted: fovea: the highest visual acuity. Hyperopia: far away, image is focused too far behind the retina. Light bleaches this and cgmp breaks down and sodium channels close and rods become hyperpolarized, glutamate is blocked: magnocellular: larger in size, input from rods, contrast sensitivity, any change and the rods become active. Everything after the chiasm is contralateral, left half of each retina goes to the left side of the brain, same with the right side. : 1-2: receiving inputs from magnocellular channel. K channel: konio, receiving input from short wave length cones.
