Refractive error
The rate of students in Hanoi and Ho Chi Minh City with refractive errors is high
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In Hanoi, about 51% of children have refractive errors, of which myopia accounts for 37.5%, hyperopia accounts for 8.2% and astigmatism is 5.3%.
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In Hanoi, about 51% of children have refractive errors, of which myopia accounts for 37.5%, hyperopia accounts for 8.2% and astigmatism is 5.3%.