NROC64H3 Study Guide - Outer Plexiform Layer, Pupillary Light Reflex, Inner Plexiform Layer
1 Mar 2013
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Document Summary
Vision: based on the light bounced into our eyes from objects, we make sense of a complex world. Light: electromagnetic energy that is emitted in the form of waves. The waves are: absorbed, scattered, reflected, bent. Retina: located at the back of the eye. Contains photoreceptors specialized to convert light energy into neural activity. Eye: automatically adjusts to differences in illumination and automatically focuses itself on objects of interest. The eye can track moving objects and keep its surface clean (via blinking and tears). Each eye has two overlapping retinas: one specialized for low light levels that we encounter from dusk to dawn, one specialized for higher light levels and for the detection of color from sunrise to sunset. Function of the retina: specialized to detect differences in the intensity of light falling on different parts of it. Image processing begins in the retina before any visual information reaches the rest of the brain.
