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Correct Answer: binocular depth cues
the correct answer to the question about perceptual features that provide information about distance and three-dimensional space, and which require the use of both eyes, is "binocular depth cues." this term refers to the visual information that the brain interprets from the slightly different views that each eye has of a given scene. the disparity in these views is essential for perceiving depth and spatial relationships in our environment.
binocular depth cues are critical for stereoscopic vision, which is the ability to perceive depth and three-dimensional structure obtained on the basis of visual information deriving from two eyes by individuals with normally developed binocular vision. this process relies heavily on the phenomenon known as retinal disparity. retinal disparity occurs because each eye views the world from a slightly different angle, and therefore each eye receives a slightly different image. the brain processes these differences to gauge distance and depth.
this concept can be contrasted with monocular cues, which only require one eye and include aspects like texture gradient, relative size, interposition, linear perspective, and motion parallax. these cues are also useful for perceiving depth but do not provide the same rich depth information that binocular cues provide.
another aspect sometimes discussed in the context of depth perception is accommodation, which refers to the adjustments made by the lens of the eye to focus on objects at different distances. however, this is more a physiological response rather than a perceptual cue for depth, and thus it is distinct from binocular depth cues.
in summary, when asked about perceptual features that need two eyes and provide information about distance and 3d space, the answer is binocular depth cues. this involves the brain's interpretation of the different visual information from each eye to perceive depth, a capability that is crucial for activities ranging from basic navigation to complex tasks requiring precise depth judgments.
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