The objective of WHO's prevention of blindness team is to assist Member States to effectively prevent blindness and restore sight, when possible. The global target is to ultimately reduce blindness prevalence to less than 0.5 % in all countries, or less than 1 % in any country.
Since the estimates of the 90s, the new data based on the world population of 2002 show a reduction in the number of people who are blind or visually impaired, in particular, those who are blind because of infectious causes. But there is an increase in the number of people who are blind or visually impaired due to increasing longevity and the increase of noncommunicable chronic diseases. It will be necessary to adapt the current strategies of prevention and care in order to take into account these demographic and epidemiological trends.
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