When an animal moves, the image of its surrounding environment moves in the retinae of the animal’s eyes. The pattern of image motion (known as the “optic flow field,” OFF) bears rich information about the animal’s own motion (termed “egomotion”), about the distance to various nearby objects, the speed of locomotion, the distance the animal has traveled, and several other parameters. This entry highlights some of the cues that are contained in the optic flow field and describes how they are used to control locomotion and enable safe and accurate navigation through the environment.
The Relation of Optic Flow to Egomotion
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