The number of blind people across the world is set to triple from about 36 million to 115 million by 2050, due to a growing ageing population, says a study in ‘The Lancet’

The researchers estimate that crude prevalence of global blindness declined from 0.75% in 1990 to 0.48% in 2015, while the rate of moderate to severe vision impairment reduced from 3.83% to 2.90%.

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