Pseudomyopia is a transient nearsightedness of the metropic or far-sighted eye due to spasm of the ciliary muscle. After mydriatic drug mydriatic examination, myopia disappeared, presented as metropism or farsightedness, in fact, the eyeball did not extend. Therefore, false myopia does not need to wear kids eyeglasses online.
True myopia is a change in the degree of myopia caused by the lengthening of the eyeball, which cannot be restored and can only be corrected or improved by wearing glasses.
Children and adolescents myopia prescription is too low or too high
During childhood and adolescence, the body develops quickly, and every organ in the body develops, including the eyeball. The development of the eyeball means that its transverse diameter becomes larger and the eye axis becomes longer, and the process of the eye axis becoming longer is the process from farsightedness to squarely and then to myopia. Normal eye development is generally stable at 18 to 20 years of age, and then in a weak farsightedness. Today, children's schoolwork pressure (class, homework, after-school tutoring), coupled with unhygienic use of the eyes, so that the emmethetization process comes ahead of time, myopia occurs in the early stage.
From the medical point of view, there are two theories leading to the occurrence of myopia, that is, the theory of fuzziness and the theory of far-sighted defocus. The so-called fuzziness theory is that when people look far and near, the worse their eyesight, the more blurred their vision, and the easier it is to increase the degree of myopia. Farsighted defocus theory is that after the light passes through the human eye, if the object is behind the retina of the eye, that is, farsighted defocus, it will cause the growth of the eye axis, resulting in myopia.
If the child's prescription is too low, it will cause blurred vision or eye fatigue when looking far, resulting in an increase in myopia. Foreign studies have shown that compared with myopic children with complete correction, the myopia degree of children with 75 degrees of undercorrection can increase by 50 degrees too quickly within 2 years.
If the degree of children and adolescents is too high, the focus of the image will be behind the eyeball when looking far, resulting in farsighted defocus and myopia. And children and adolescents wearing too high degree of glasses is also difficult to adapt, often appear eye distension, headache, blurred and other symptoms of visual fatigue.
Therefore, in the developing period of children and adolescents, in order to prevent myopia from growing too fast, it is necessary to carry out detailed medical optometry and wear accurate glasses.
