Motion/Pursuit Law in 2D (Visual Depth Perception 3)

time t

-5

scale

125

This Demonstration computes the motion/pursuit law in the two-dimensional horizontal fixation plane of the eyes. The observer is looking mainly at F on the vertical axis, but also sees D as he translates to the right at speed equal to the interocular distance per second.

We do not know a theoretical explanation for the rough approximation of the peak motion pursuit law by the 2D relative distance, but this Demonstration compares

dθ

dβ

(0)

,

dθ

dβ

(

t

c

)

, and the 2D signed relative distance,

±

|D-F|

f

. It also lets you vary time and compare the motion/pursuit law at other times. You can drag the distractor point and the fixate distance is variable.