PSYC 271 Study Guide - Final Guide: Visual Field Test, Umami, Reticular Formation
23 Feb 2017
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Visual system is capable of transforming upside down 2d retinal images into the 3d world that we perceive: what (cid:449)e (cid:862)see(cid:863) is(cid:374)"t the sa(cid:373)e thi(cid:374)g as (cid:449)hat (cid:449)e are i(cid:374) realit(cid:455) looki(cid:374)g at. It is a metal representation constructed by our brains based on the information it receives from our eyes. The human eye can only see a small portion of the electromagnetic spectrum: 380nm - 760nm. Sensitivity- ability to detect the presence of dimly lit objects. Acuity- ability to see the details of objects. Summary: light bouncing off of surroundings enters eye through pupil, travels through the lens (focuses the light into the retina) Is reflected upside down on retina, at back of eyeball. Is transformed into a chemical signal by specialized light reactive receptor cells: chemical signal is forwarded to the primary visual cortex (v1) in the brain. Iris- contractual tissue surrounding the pupil: determines how much light is allowed into the eye via dilation and contraction.
