The term blindness implies total or

partial loss of vision involving both eyes. The exact

level of vision defined as blindness, however,

varies in different countries because of differing

legal or social requirements. In the United States,

blindness is defined as unimprovable vision of

20/200 (6/60) or worse. This means that an

individual is generally considered blind who, even

with the use of ordinary eyeglasses, can see no

better at 20 ft (6 m) than a person with normal

vision can see at 200 ft (60 m). On the other hand,

the World Health Organization (WHO) Program

Advisory Group on the Prevention of Blindness

lists the vision level suggested as blindness as a

visual acuity of less than 10/200 (3/60), which is

twice as low as the U.S. definition. The WHO

level of visual acuity is also described as the

inability to count fingers in daylight at a distance of

10 ft (3 m), because in many regions a great

number of people cannot receive formal eye

examinations but......

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Title: Blindness
Approximate Word Count: 518
Approximate Pages: 3 (250 words per double-spaced page)

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