Binocular cues require which of the following?

Binocular cues require which of the following?

• A. One eye
• B. Monocular cues
• C. Two eyes
• D. Auditory cues

Answer: (C)

Binocular cues rely on information from both eyes to judge depth. The brain compares the two slightly different images each eye receives (retinal disparity) and fuses them to create a sense of three-dimensional depth. It also uses the inward turning of the eyes as objects get closer (convergence) to gauge distance. These two signals together give stereoscopic depth, which specifically requires two eyes. Using one eye can still provide some depth through monocular cues like perspective and shading, but true binocular depth perception rests on input from both eyes. Auditory cues don’t provide visual depth information.

Binocular cues rely on information from both eyes to judge depth. The brain compares the two slightly different images each eye receives (retinal disparity) and fuses them to create a sense of three-dimensional depth. It also uses the inward turning of the eyes as objects get closer (convergence) to gauge distance. These two signals together give stereoscopic depth, which specifically requires two eyes. Using one eye can still provide some depth through monocular cues like perspective and shading, but true binocular depth perception rests on input from both eyes. Auditory cues don’t provide visual depth information.