For a long time, genetic factors have been mentioned as the main cause of
myopia. But recently, Prof. Ian Morgan of the Australian National University
said in a prominent scientific journal Nature that "myopia spreads like an
epidemic in Asian countries because people have not seen enough sunlight".
According to the research team, it is estimated that 90% of today's children
are nearsighted, compared with 10-20% of youth in East Asia 60 years ago and
the increase in myopia seems too rapid for only genetic reasons. In line with
this, the Chinese government recently issued a "management and action plan
for preventing myopia of children and adolescents," including encouragement
of the appropriate use of lighting and outdoor activities. It is interpreted as
a policy that takes into account the negative effects on vision by the use of
inadequate artificial light that emits excessive blue light.
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