Percentage Of Blind People
However problems are generally minor and most color blind people adapt.
Percentage of blind people. In most caucasian societies up to 1 in 10 men suffer however only 1 in 100 eskimos are color blind. Color blindness may make some educational activities more difficult. The majority of people with vision impairment and blindness are over the age of 50 years.
Partial vision loss varies. Visual impairment also known as vision impairment or vision loss is a decreased ability to see to a degree that causes problems not fixable by usual means such as glasses. 10 fascinating facts about the white cane.
Color blindness color vision deficiency is the decreased ability to see color or differences in color. The leading causes of vision impairment and blindness are uncorrected refractive errors and cataracts. In the united states it is estimated that 9 to 12 percentages of sufferers are reportedly blind due to glaucoma.
Visual impairment is often defined as a best corrected visual acuity of worse than either 20 40 or. It is recommended that people get regular eye checkups are diagnosed in an early stage and when diagnosed follow the doctor s plan so that total blindness can be prevented by proper treatment. However according to perkins school for the blind most people who are visually impaired don t use a white cane.
20 200 vision in most of the united states or 6 60 in europe. Globally at least 1 billion people have a near or distance vision impairment that could have been prevented or has yet to be addressed. The probability of glaucoma related blindness in at least one eye at 20 years decreased from 25 8 percent 95 percent confidence interval 18 5 32 5 for subjects diagnosed between 1965 and 1980 to 13 5 percent 95 percent confidence interval 8 8 17 9 for subjects diagnosed between 1981 and 2000 p 0 01.
Some also include those who have a decreased ability to see because they do not have access to glasses or contact lenses. Legal blindness is defined as falling short of a statutory standard of visual acuity. According to a cdc study in 2008.
It can impair such tasks as selecting ripe fruit choosing clothing and reading traffic lights. In fact only an estimated 2 percent to 8 percent do. Of those approximately 1 3 million americans are legally blind.
With a relatively large number of people over 50 the highest incidence of visual impairment in these areas is predominantly related to a high population of elderly people. China and india account for 45 of all cases of blindness and msvi but only 36 of the world s population.
