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MOTION PARALLAX |
BINOCULAR DISPARITY |
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OBJECTS BEHIND FIXATION |
Move in the same direction as you. The further from fixation, the faster they move. For any given distance from fixation, objects behind fixation move more slowly than objects in front of fixation. |
Seen in uncrossed disparity, project to non-corresponding retinal points. The further from fixation, the larger the angle of disparity. For any given distance from fixation, objects behind fixation produce a smaller angle of disparity than objects in front of fixation. |
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FIXATED OBJECT |
Doesn’t move in the image (stays in the fovea.) |
Is on the horopter. No disparity, projects to corresponding retinal points. |
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OBJECTS IN FRONT OF FIXATION |
Move in the opposite direction from you. The further from fixation, the faster they move. For any given distance from fixation, objects in front of fixation move faster than objects behind fixation. |
Seen in crossed disparity, project to non-corresponding retinal points. The further from fixation, the larger the angle of disparity. For any given distance from fixation, objects in front of fixation produce a larger angle of disparity than objects behind fixation. |