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

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

 
 

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