PSY 250 Lecture Notes - Lecture 11: Photopic Vision, Scotopic Vision, Color Vision
29 Mar 2017
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Document Summary
Inside the brain, things are quite different from physical reality. Human vision limited can only see part of electromagnetic spectrum: 380-760 nm of wavelength. Visual stim are inherently ambiguous and human perception is subjective. Do we need light to see: absolutely no light, no vision. What about nocturnal animals: still need light. Visual field = extent of visual space seen by each eye and when looking straight ahead (fixed) Visual sensitivity ability to detect light. Visual acuity ability to distinguish b/w two nearby points in space (i. e. visual resolution) Visual transduction begins when visual receptors convert light energy into neural signals. What is advantage of having one eye on each side of head (i. e. rabbits: greater visual field, usually prey. Advantage of having both eyes in front? (i. e. monkey: binocular disparity i. Diff in position of same image on two retinas helps brain create 3d/depth perception. Things that we see image is reversed and upside down.
