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دید در محیط
Ambient vision, also referred to as peripheral vision, encom-passes the entire visual field.
While focal vision is largely static, ambient vision is dynamic, integrating with other sensory systems to update us constantly about our changing world—and it works correctly only if the “software” of the neural system is intact.
Identifying deficits in ambient vision is crucial, because this system is key to defining both our self-image and our view of our world.
Right now, for example, your ambient vision is sending you a constant stream of data about the location of your body in space, and the location of other people or objects—in addition to telling you how quickly they are moving, and in what direction.
If someone walks up to you, your focal vision will tell you who the person is—but your ambient vision will quickly transmit critical cues about the person’s changing “body language,” how close he or she is to you, and whether you should be relaxed or alarmed by the encounter.
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