In 2015, 253 million people worldwide had visual impairment.
Of these, 36 million were blind and 217 million had partial visual impairment.
According to a survey of fifteen international researchers in the British scientific journal "The Lancet Global Health" published in 2017, this number is estimated to triple by 2050. The reasons for this are the population growth and aging. According to researchers' estimates, the number of blind people will double by 2050.
The number of people with moderate to severe visual impairment is also estimated to triple, reaching 588 million.