Global causes of blindness and distance vision impairment 1990–2020: a systematic review and meta-analysis

Short summary

In 2015, uncorrected refractive error and cataract were the leading causes of vision impairment (116.3M and 52.6M people, respectively) and blindness (7.4M and 12.6M people, respectively), with numbers projected to rise by 2020. These two conditions combined accounted for 55% of blindness and 77% of vision impairment in adults over 50.

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