If ________ does not occur when fixations shift between near and far objects,one sees double objects.

Question

Quizplus · Accepted Answer

Vergence is the simultaneous movement of both eyes towards or away from each other to maintain single binocular vision. When shifting focus between near and far objects, vergence needs to occur to maintain a single visual image. If vergence does not occur, double objects will be seen. Visual accommodation is the process of changing the shape of the lens to focus on near and far objects. Smooth visual pursuit is the ability to track moving objects smoothly with the eyes. Visual acuity is the sharpness or clarity of vision. None of these are directly related to the phenomenon of seeing double objects when fixations shift between near and far objects.

If ________ Does Not Occur When Fixations Shift Between near and Far