1.What is myopia? In short, myopia is the ability to see close and not far. In myopia, the light entering the eye only gathers in front of the retina because the front and back diameter of the eye (eye axis) becomes longer or because the light medium in the eye (crystalline lens, etc.) refracts excessively, making it unclear to see things, especially at a distance. 2. How do I get myopia? Most myopia is caused by improper eye protection, but a small percentage is inherited. The most common causes are reading, writing homework, playing with the computer when the eyes are too close, and using the eyes continuously for too long. 3. Is myopia pseudomyopia because my child is small and has a low prescription? Not necessarily. To determine whether it is true or pseudomyopia, you must rely on dilated eye examinations, according to the age and degree of depth to determine is not scientific, more than 20 years old is not necessarily true myopia, low degree is not necessarily pseudomyopia. 4, the longer myopia glasses are worn the higher the myopia is? After the regular optometry wear myopic lenses, not only will not deepen the degree, but also can reduce fatigue, prevent strabismus, amblyopia and eye protrusion. Some wear myopia lenses will deepen, that is because the eye is not fully developed before the age of 18, the development process of myopia may be higher and higher. 5.How should myopia be prevented in teenagers? Prevention should start from many aspects. Classrooms should be bright and spacious, tables and chairs should be of appropriate height, sitting posture should be correct, continuous eye time should not exceed 40 minutes, nutrition should be balanced, sleep should be adequate, and do not read while walking, riding in a car or lying down. 6.What circumstances may indicate myopia in children? ① squinting when looking at distant objects; ② lying very close when reading, watching TV always like to be close to the TV; ③ often frowning when looking at objects; ④ emotional impatience, relationship with children becomes unfriendly, action and thinking ability decreases, lack of patience in learning, academic performance decreases.