binoular vision

binoular vision - Vision Science III: Ocular Motility &...

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Lab 1 - Visual Direction Binocular vision is such a natural part of our daily lives that we fail to appreciate some of the complex issues involved in creating a single sense of direction from two eyes. Early vision scientists designed simple experiments that allowed them to discover some of the basic principles of visual direction. We will repeat some of these experiments in today’s lab. Work in pairs, but take turns so each person can be the subject of each experiment. Turn in one sheet per pair, with the results for both subjects, as well as answers to the discussion questions. 1. LOCATING YOUR EGOCENTER When computing our sense of binocular visual direction, the brain receives oculocentric direction and ocular orientation data from each eye. It then computes a unified sense of direction, such that the location of objects are perceived as if viewed from a virtual cyclopean eye located at the egocenter . Most scientist say that the egocenter located is approximately midway between the two eyes, but some suggest that it is centered in the dominant eye, the center of rotation of the head, or elsewhere. It is also possible that the egocenter may vary from person to person. Tape together several pieces of paper to make one long piece, which you tape to the upper surface of the cardboard. Let a few inches of the paper extend beyond the end that will against the subject’s face. Cut the paper and fold it under the board, so you will be able to move it against the subject’s face, with the eyes over the edge of the upper surface. Stabilize the board against the subject’s face, just below eye-level, and mark the location of the corneal apices on the paper. Draw a line between the two corneal apex marks, and mark its center.
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This note was uploaded on 06/07/2011 for the course OPTO. 101 taught by Professor Bill during the Spring '08 term at Indiana East.

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binoular vision - Vision Science III: Ocular Motility &...

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