blind demographics

There are four levels of visual function:

_normal vision

_moderate visual impairment

_severe visual impairment

_blindness.

Statistics:


_About 314 million people are visually impaired worldwide, 45 million of them are blind.

_Most people with visual impairment are older

_Females are more at risk at every age in every part of the world

_About 87% of the world's visually impaired live in developing countries.

_The number of people blinded by infectious diseases has been greatly reduced, but age-related impairment is increasing.

_About 82% of all people who are visually impaired are age 50 and older (although they represent only 19% of the world's population).

Resources:

http://www.who.int/mediacentre/factsheets/fs282/en/