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Visual Ecology$
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Thomas W. Cronin, Sönke Johnsen, N. Justin Marshall, and Eric J. Warrant

Print publication date: 2014

Print ISBN-13: 9780691151847

Published to Princeton Scholarship Online: October 2017

DOI: 10.23943/princeton/9780691151847.001.0001

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Motion Vision and Eye Movements

Motion Vision and Eye Movements

(p.232) 10 Motion Vision and Eye Movements
Visual Ecology

Thomas W. Cronin

Sönke Johnsen

N. Justin Marshall

Eric J. Warrant

Princeton University Press

This chapter considers motion vision and eye movements. It analyzes the general features and properties of motion vision that apply to all animals and examines how these are tuned for the visual ecological requirements of different species—from small creatures such as fruit flies and jumping spiders to falcons and their prey. As it turns out, far more is known of motion vision in tiny animals than in any of the larger and more familiar species. The visual stimulus for motion is a shift in the position of an image, or portion of an image, on the retina. In almost all animals, the great majority of image shifts on the retina are generated by the animal itself, through its own movements. Only completely sessile animals with utterly stable eyes escape a sense of motion dominated by self-generated stimuli.

Keywords:   motion vision, eye movements, animals, visual ecological requirements, small creatures, visual stimulus, retina, image shifts

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