Eye exercises wall chart with standard vision chart(Chinese Edition) - Tapa blanda

Eye exercises wall chart with standard vision chart(Chinese Edition)

paperback. Condición: 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. Nº de ref. del artículo: BZ024205

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