Motion, Pursuit, Fixate, and Distractor (Visual Depth Perception 2)

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This Demonstration shows the retinal motion and pursuit rates for your choice of and in the case of a fixate and distractor on the axis and an observer moving at 6.5 cm/sec (interocular distance per second) to the right on the axis. The observer's eyes are "fixed" on the point (the "fixate" point). "Fixation" means the ray from through the eye node strikes the fovea at the center of the retina (see: Fixation and Distraction (Visual Depth Perception 5)).

Contributed by: Keith Stroyan (March 2011)
Open content licensed under CC BY-NC-SA


Snapshots


Details

This Demonstration is for the case of a fixate and distractor on the axis and an observer moving at speed 6.5 cm/sec (interocular distance per second) to the right on the axis. Additional details of this framework are given in the Demonstration "Motion/Pursuit Law in 1D (Visual Depth Perception 1)". This Demonstration shows a different graphical representation of the dynamic quantities.

If you know , pursuit at speed is given by the formula

at . Once you know and , time zero motion is given by the formula

.

All the points on the red line have the same M/P ratio and same relative depth. The brown curves have the same and the vertical blue lines have the same .

The eye parameters , , , etc. are described in the Demonstration "Eye Parameters (Visual Depth Perception 6)" in the Related Links.



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