Untreated distance vision impairment in low- and middle-income regions is about four times higher than in high-income regions, and $14.3 billion (U.S. dollars) is needed to treat the 1 billion people with vision impairment or blindness due to cataracts, and short- and far-sightedness, the report said.
from WebMD Health https://www.webmd.com/eye-health/news/20191011/vision-problems-strike-more-than-2-billion-globally?src=RSS_PUBLIC
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