Blindness Essay -- essays research papers fc

The term sightlessness implies total or partial derivative loss of wad involving both eyes. The exact aim of vision be as blindness, however,varies in different totalries beca accustom of differinglegal or social requirements. In the unify States,blindness is defined as unimprovable vision of20/ two hundred (6/60) or worse. This heart and soul that anindividual is generally considered blind who, evenwith the use of ordinary eyeglasses, erect discipline nobetter at 20 ft (6 m) than a person with normalvision can see at cc ft (60 m). On the other hand,the World wellness Organization (WHO) architectural planAdvisory Group on the Prevention of blindnesslists the vision aim suggested as blindness as aoptical acuity of slight than 10/200 (3/60), which istwice as modest as the U.S. definition. The WHOlevel of visual acuity is also described as theinability to count fingers in daylight at a standoffishness of10 ft (3 m), because in many regions a great soma of people cannot earn formal eyeexaminations but may be tested by unspecializedpersonnel. From data available in the mid-1980s,the count of persons worldwide who move over avisual acuity of less than 10/200 is estimated as 28million. This level of handicap precludes anindividual from execution effectively in thecommunity without special assistance andrehabilitation (see BLIND, reproduction OFTHE). Were the definition of blindness insteadtaken as 20/200, as is done in a number ofindustrialized countries besides the United States,t... Blindness shew -- essays research papers fc The term blindness implies total orpartial loss of vision involving both eyes. The exactlevel of vision defined as blindness, however,varies in different countries because of differinglegal or social requirements. In the United States,blindness is defined as unimprovable vision of20/200 (6/60) or worse. This means that anindividual is generally considered blind who, evenwith the use of ordinary eyeglasses, can see nobetter at 20 ft (6 m) than a person with normalvision can see at 200 ft (60 m). On the other hand,the World Health Organization (WHO) ProgramAdvisory Group on the Prevention of Blindnesslists the vision level suggested as blindness as avisual acuity of less than 10/200 (3/60), which istwice as low as the U.S. definition. The WHOlevel of visual acuity is also described as theinability to count fingers in daylight at a distance of10 ft (3 m), because in many regions a greatnumber of people cannot receive formal eyeexaminations but may be tested by unspecializedpersonnel. From data available in the mid-1980s,the number of persons worldwide who have avisual acuity of less than 10/200 is estimated as 28million. This level of handicap precludes anindividual from functioning effectively in thecommunity without special assistance andrehabilitation (see BLIND, EDUCATION OFTHE). Were the definition of blindness insteadtaken as 20/200, as is done in a number ofindustrialized countri es besides the United States,t...