PSYC 2410 Chapter Notes - Chapter 6: Lateral Geniculate Nucleus, Binocular Disparity, Mach Bands
1 Aug 2013
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Document Summary
Iris: contractile tissue for pupil, regulates how much light is reflected into the eye, coloured part, wide more light sensitivity less acuity. Lens: role in accommodation, object is far, light rays are essentially parallel therefore lens is thin, object is close, rays need to converge more and lens is thick. Blind spot: no photoreceptors due to fact that retina is inside out. Also get distortion because light has to travel through structures (why we have a fovea high acuity) Solution: brain uses information from receptor cells around blind spot to fill in information so we do not see patch in visual field. Binocular disparity: two eyes see slightly different images allows us to see depth. Presbyopia: reduced ability to see things close up as we age, due to lens becoming less flexible. Photopic vision: cone mediated, best in high illumination, low convergence, need bigger signal, high acuity, colour.
