As the distance between an object and the horopter increases, the binocular disparity for the object _____, regardless of whether disparity is crossed or uncrossed.
A) increases
B) decreases
C) remains unchanged
D) reaches an intermediate point

Question

Quizplus · Accepted Answer

As the distance between an object and the horopter (the region in space where objects are seen single with binocular vision) increases, the binocular disparity (the difference in image location of an object seen by the left and right eyes) for the object increases. This is because objects farther from the horopter deviate more from the points where the visual axes of the eyes intersect, leading to greater disparity.

As the Distance Between an Object and the Horopter Increases