"Once myopia is present, there is currently no international way to stop its progress. At present, foreign countries believe that ensuring daily outdoor activities for 3 hours is the most important way to prevent myopia." Dr. Zeng Yangfa told reporters that myopia is the result of both environmental and genetic . When parents are nearsighted or one of them is nearsighted, children are more likely to be myopic; but if they are in a prone to nearsightedness for a long period of time, even if there are no genetic factors, they will be nearsighted. He also pointed out that there are many patients with myopia in China, but some experiments have shown that the heritability of myopia does not differ from person to person. Therefore, there are many people with myopia in China. The difference lies in the environment.

He said that a few days ago, internationally renowned ophthalmologists announced a trial conducted in Australia on the prevalence of myopia in 6-year-old school-age children. The results showed that the cumulative daily rate of children with a total of 3 hours of outdoor activities is only 0.8%, accumulated daily. Children with outdoor activities for 1 hour have only 3% myopia. The same experiment was conducted in Singapore's six-year-old school-aged children and found that children who had accumulated half an hour of outdoor activity each day had a myopia rate of 24%. Therefore, the test proved that a total of 3 hours of outdoor activities a day can make school-age children almost non-myopia. Dr. Zeng Yangfa pointed out that outdoor activities refer to going outdoors and not looking closely (computers, books, homework, etc.) and trying to look far away. This is a protective factor for eyesight, because looking close will make the axis longer State, cumulative effects can cause myopia.

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