Visually impaired range from partial to total loss of sight. A person is legally blind if he or she sees with the better eye at 20 feet or less what a person with "normal" vision sees at 200 feet (20/200 vision). A person who is legally blind may have some vision, or may have no vision at all. A person who is visually impaired has eyesight between 20/70 and 20/200. The assistance that a person with a visual impairment requires depends on the degree of sight loss and when the loss occurred.
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