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WHAT IS VISION IMPAIRMENT?

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Vision impairment refers to the inability use eyesight by the usual means. Since vision impairment is a broad term, it can include very low vision, inability to see certain colors (colorblindness), or no vision (complete blindness).

In the human anatomy, the eyes and brain work together to create eyesight. The eyes are composed of many small parts, including the cornea, iris, lens, and retina. Each part coordinates to capture and focus on light and images. The parts also contain nerve endings that send signals to the brain, allowing the brain to recognize and process these images. Processing also creates different aspects of eyesight like field of vision, central acuity, and peripheral vision.

For people with usual vision, the sight process happens instantaneously. If the process does not work as it should, however, a person will have vision impairment or blindness. A person can be visually impaired in one or both eyes.



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