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

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

 
 

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