Peripheral vision意思
"Peripheral vision" is a term used to describe the vision that occurs outside the very center of gaze. It is the ability to see objects or movement in your surroundings without focusing directly on them. The peripheral vision covers the areas to the left and right of the central gaze, as well as the upper and lower visual fields.
Peripheral vision is important for several reasons:
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Awareness of Surroundings: It allows us to be aware of our environment without having to turn our heads or focus on every object around us. This can be crucial for safety, such as noticing a moving vehicle or person in our peripheral vision.
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Depth Perception: While it's not the primary function, peripheral vision can contribute to our sense of depth and distance. It helps us to perceive the world in three dimensions.
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Motion Detection: The human eye is particularly sensitive to movement, and peripheral vision is very good at detecting motion. This is why we often notice the movement of something before we notice its exact shape or color.
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Eye Movement Reduction: By using peripheral vision, we can gather information about our surroundings without the need to make constant eye movements (saccades) to the left and right. This can help in maintaining visual stability and reducing eye fatigue.
Peripheral vision is less acute than central vision, which is what we use when we look directly at an object. It has a lower resolution and is not as good at distinguishing fine details or colors. However, its ability to detect motion and provide a wide field of view makes it a vital part of our overall visual ability.