Binocular cues
Depth cues, such as retinal disparity, that depend on the use of 2 eyes
Binocular cues are visual cues that rely on the coordination of the two eyes to provide depth perception and spatial awareness. They are based on the different images produced by the two eyes due to their slightly different perspectives on the same object, which are then combined into a single three-dimensional image by the brain. There are two primary types of binocular cues: convergence and retinal disparity:
1. Convergence: This cue refers to the inward turning of our eyes as we focus on closer objects. When an object is closer to us, the muscles in our eyes contract in order to bring both eyes together to focus on the object. This convergence helps to gauge the distance of the object and provide depth perception.
2. Retinal disparity: This cue refers to the difference in the images that are received by each retina. Each eye views the same object from a slightly different angle, thus the images that are received by each retina are not identical. When the brain combines the two images it receives, it creates a three-dimensional representation of the object, giving a sense of depth and spatial awareness.
Overall, binocular cues are essential for accurate depth perception and spatial awareness, and they work in conjunction with other cues such as monocular cues (depth cues that require only one eye) to allow us to perceive and navigate our environment effectively.
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