The number of people with vision in the world is currently 36 million. By the year 2050, this number will rise three times to 11.5 million. Most of this large number of people with vision blind people live in Africa and Asia. Researchers released this information on Thursday in The Lancet Global Health magazine. The lancet's report says that those who have moderate to severe vision and those who do not recover with glasses, contact lenses or just a single surgical procedure, their numbers will also increase threefold. And the number will rise from the present 21 million 70 million to 58 million 80 million. Researchers have collected this data from 188 countries and collected this information. Research columnist Rupert Bourney said the report was based on the United Nations population projection.