Does the language we read/write in have anything to do with how early we get bad vision? There is obviously a difference within countries, as some countries have a higher percentage of people with bad vision than others. Is the difference due to language, due to climatic and weather conditions and how much sun shines in the area? Can societal eye health be a predictor for something larger, more meaningful, such as how happy the country is, or whether is it more developed?
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