Head or body movement causes scene retinal displacement. Nearer objects displace more, and farther objects displace less {motion parallax}| {movement parallax}. If eye moves to right while looking straight-ahead, objects appear to move to left. See Figure 1.
Nearer objects move greater visual angle. Farther objects move smaller visual angle and appear almost stationary. See Figure 2.
movement sequence
Object sequence can change with movement. See Figure 3.
depth
Brain can use geometric information about two different positions at different times to calculate relative object depth. Brain can also use geometric information about two different positions at same time, using both eyes.
While observer is moving, nearer objects seem to move backwards while farther ones move in same direction as observer {monocular movement parallax}.
1-Consciousness-Sense-Vision-Physiology-Motion
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Date Modified: 2022.0225