PSY2061 Study Guide - Final Guide: Binocular Disparity, Retina, Sensory System
4 Aug 2018
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Document Summary
Light enters the eye and reaches the retina w. Amount of light reaching the retina is regulated by the irises. Light enters the eye through the pupil; the size changes in illumination. Sensitivity: ability to detect the presence of dimly lit objects. Acuity: ability to see the details of objects. High illumination: sensitivity is not important, pupils constricted --> image is sharper and greater depth of focus. Low illumination: acuity and depth of focus is compromised, receptors not activated --> pupils dilate --> less light let in. Ciliary muscles: relaxes or tightens to allow the lens to change its shape to focus. Accommodation: process of adjusting the configuration of the lenses to bring images into focus on the retina w. Allows vertebrates to see in almost every direction without moving. Movements of eyes are coordinated so that each point in the visual world is projected to corresponding points on two retinas.
