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Eye exercises wall chart with standard vision chart(Chinese Edition)
Editore:
Hubei Science and Technology Press, 2014
ISBN 10: 7535267580
ISBN 13: 9787535267580
Nuovo
paperback
Da: liu xing, Nanjing, JS, Cina
Valutazione del venditore 5 su 5 stelle
paperback. Condizione: New. Language:Chinese.Paperback. Pub Date: 2014-8-1 Pages: 1 Publisher: Hubei Science and Technology Press. studies have shown that with the large increase in the use of learning pressure and electronic products. schoolchildren incidence of myopia increased year by year. according to the Chinese Journal of Ophthalmology Network statistics: myopia population accounts for 30% of the total national number. city myopic population ratio reached 33%. which. in the school's pupils wear glasses ratio of 3. Codice articolo BZ024205
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