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Researchers predicted a new report published the journal Opthalmology that 2050, half the world's population will be short-sighted. The medical term for this condition is myopia. It is also known near-sightedness. It is when we have difficulty focusing objects that are far away us. The researchers say that around 4.8 billion people will suffer myopia. This is a seven-fold increase cases from 2000 to 2050. Sixty years ago, around 15 per cent the Chinese population was short-sighted. Now, almost 90 per cent Chinese teenagers and young adults have trouble seeing faraway objects. A recent survey found that to 95 per cent of teenagers in South Korea are near-sighted.

The researchers said they could not pinpoint definite reasons this phenomenon and say it could be a combination factors. They did say that looking computer screens and mobile phones could be a leading cause. Researchers said the sudden rise myopia may be linked to "lifestyle changes resulting a combination of decreased time outdoors and increased near-work activities". Science journalist Sarah Zhang said, "spending time outdoors, especially early childhood, reduces the onset myopia". Professor Kovin Naidoo, a co-author the report, offered some advice. He said: "You could spend a long time reading computers and screens, but also spend two hours outdoors."

 
 

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