Myopia is one of the common eye diseases in China, and its main symptom is the lack of clarity in seeing far away. The causes of myopia are not fully understood, but are generally considered to be related to a variety of factors, including ethnicity and genetic factors: myopia has a certain genetic tendency, and children of parents with myopia, especially high myopia, have a higher incidence of myopia. Developmental factors: In infancy, the eye is short and often farsighted, and as the eye grows older, the eye grows longer and longer. Environmental factors: long-term close work, especially dim light, poor reading and writing posture, poor printing quality of books and magazines, blurred handwriting, etc. The prevention of myopia is mainly aimed at the acquired environmental factors, such as developing good eye habits from childhood, proper posture, keeping the reading distance at 25-30 cm, not reading while riding in a car, walking or lying in bed, not using dark or bright lighting when reading, and taking a 10-20 minute break after 40 minutes or one hour of continuous eye use. In addition, it is important to check your vision regularly, and if there is any abnormality, promptly get an optometry and correction. In addition, the wide range of myopia treatment products on the market dazzle people, many parents think that the money spent on children with these products, children will not be myopia, or myopia can be cured, in fact, this thought is wrong. In fact, the vast majority of these products is also the concept of hype, for profit, not many really effective, and some because of the lack of long-term use of adverse reactions to track, in case the harm to children is not good.