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

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