When focusing on a close object that is directly in front of you, eye muscles contract to turn your eyes inward towards the nose. This is called _______________
A) convergence
B) retinal disparity
C) monocular depth
D) binocular depth
Answer: A
Rationale: One type of binocular depth cue, called convergence, occurs when the eye muscles contract so that both eyes focus on a single object. The sensations that occur as these muscles contract to focus on a single object create the perception of depth. Convergence typically occurs for objects that are relatively close to you. For example, as you track an object that is moving toward you, such as your fingertip toward your nose, your eyes move inward toward the nose.
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