Shortsightedness often develops rapidly in school-aged children and becomes worse during their teenage years. A person who has developed shortsightedness may experience blurred vision, headaches, eyestrain or frequent squinting. Uncorrected shortsightedness may cause a person to feel fatigued after driving, watching television, or playing sports.
Nowadays, the rate of shortsightedness among people grows rapidly. Some oculists suggest that if people are close to being shortsighted, they should choose suitable glasses as soon as possible. Or, it will become worse. And here are some causes of shortsightedness.
Genetics always plays a part in shortsightedness development. Shortsightedness has a hereditary tendency, that is to say, if both parents are myopic, there would be higher tendency for children to be myopic, especially for high shortsighted.
Nutrition is important and necessary, especially during babies’ growth age. Mother’s breast milk happens to be rich in DHA, which is why it’s known as the best food for babies. However, with our hectic city lifestyle, many mothers do not have the luxury of breastfeeding. Hence they have no choice but to relay on formulas milk, which typically do not have as much antibodies or nutrients as human milk. This speculation may be a reason why children are more susceptible to myopia.
Our modern lifestyle is a major cause on myopia. Nowadays, students read a lot of books both in school and at home. However, many of them do not pay attention to their eyes protection. They ignore the rule of keeping their eyes in a certain distance while reading and writing; besides, they do not have a rest after reading for a long time, which is unhealthy for their eyesight and can easily cause shortsightedness.
Another inevitable cause for shortsightedness is environmental pollution. It is because cornea is breathability that it exchanges air with air outside all the while, and 80% of the oxygen it needs for metabolism if from air. If air is polluted seriously, the poisonous substances in the air will enter the cornea, which, after a long time, will have a bad effect on eyesight and cause shortsightedness surely.
From above we can see that most causes of myopia are changeable if people themselves have the awareness to protect their eyesight. And this action should be taken as soon as possible.
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