The first source in this learn node is an article the open access journal Public Library of Science Biology in which researchers explore how at the neural level we may sharpen what we see in the presence of eye movements. The journal’s December 2007 issue’s table of contents features the image shown to the left, with this explanation:
Our eyes are constantly moving, which blurs the image of the world across the retina. Shown here is a neural network model of the visual cortex that removes this motion blur by using neural connections that are matched to the statistics of eye movements. (see Pitkow et al., e331).
To learn more about where seeing occurs, Webvision has a discussion of “Roles of amacrince cells,” which are “cells of the vertebrate retina [which] are interneurons that interact at the second synaptic level of the vertically direct pathways consisting of the photoreceptor-bipolar-ganglion cell chain.” Just to take a peek at how the eye works, or to study in detail, the amacrince page is an excellent open resource created at the John Moran Eye Center, University of Utah: WEBVISION: The Organization of the Retnia and Visual System.
The University of Texas also has some outstanding online materials for learning about motion perception, including this page in a Center for Perceptual Systems. Even for beginning and young students, spending some time with webpages like these introduces basic ideas and tickles the curiosity about vision and the biology from which it arises.
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