Question

Which of the following is NOT a monocular cue for depth?

• A. Convergence
• B. Overlap
• C. Linear perspective
• D. Texture gradient

Hint:

There are only two major binocular depth cues to memorize: Retinal (Binocular) Disparity and Convergence. All other pictorial cues are monocular.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
The question asks us to identify which of the listed depth perception cues requires the use of both eyes (making it binocular rather than monocular).

Step 2: Detailed Explanation:

• Depth cues are divided into monocular cues (perceived with one eye) and binocular cues (requiring coordinated visual input from both eyes).

• Overlap (interposition) is a monocular cue where an object blocking another object is perceived as being closer.

• Linear perspective is a monocular cue where parallel lines appear to converge as they recede into the distance.

• Texture gradient is a monocular cue where closer surfaces show distinct details and distant surfaces appear smooth and packed.

• Convergence is a binocular depth cue. It is a neuromuscular cue that relies on the brain sensing the angle of inward rotation of the eyes when focusing on nearby objects.

Step 3: Final Answer:
Convergence is a binocular depth cue and is therefore NOT a monocular cue for depth.