Astigmatism is a refractive irregularity of the eye that is related to the curvature of the cornea. The cause of astigmatism is that the refractive index of the corneal meridians is not uniform due to the uneven thickness or curvature of the cornea, so that the light passing through these meridians does not gather at the same focus. In this way, the light is not accurately focused on the retina to form a clear image, and this condition is called astigmatism. Astigmatism is divided into myopic astigmatism, hyperopic astigmatism and mixed astigmatism. Astigmatism can cause and aggravate myopia. 2, cause amblyopia. more than 100 astigmatism can cause amblyopia, the higher the degree of astigmatism, the more severe the amblyopia. 3. Causes deviated looking, squinting and squinting. Second, astigmatic amblyopia treatment: 1, wear astigmatism: more than 75 degrees should wear a mirror, wear all day. Farsighted astigmatism 100 degrees wear 1 year, 200 degrees wear 2 years, and so on. Nearsighted astigmatism and mixed astigmatism wear until 9 to 10 years old when myopia is not too developed can usually not wear. 2, amblyopia instrument treatment: 100 degrees with the first generation or non-light brush instrument, 200 degrees with the second generation, and so on. The higher the astigmatism amblyopia vision is cured, the better the bare eye vision of taking off the glasses, and the greater the chance of taking off the glasses. 3, myopia – astigmatism control instrument: (eye expansion resonance mirror), expansion eye resonance, can loosen the adjustment, shorten the eye axis, relieve the eyelid pressure cornea, so that the cornea becomes garden, so as to control the development of myopia and slow down astigmatism. Myopic or mixed astigmatism Myopic astigmatism or mixed astigmatism causing amblyopia can be seen as a potential myopia, as it can easily become myopic leading to lifelong lens wear. The danger of myopic astigmatism and mixed astigmatism amblyopia is that the presence of amblyopia can promote the development of the myopic component of the astigmatism, eventually turning the astigmatism into myopia and leading to lifelong glasses wear. However, if the amblyopia caused by mixed or near astigmatism is cured early, mixed or near astigmatism can be left untreated and glasses can be removed after 9 to 10 years of age (when the myopic component of the astigmatism is more stable). The principle of treating myopic or mixed astigmatism is to cure amblyopia as early as possible and to prevent astigmatism from turning into myopia. The main points of treatment are: ① All the astigmatic lenses; i.e., all those with less than 400 degrees are corrected; ② Preference is given to hyperopic astigmatism, unless the myopic component is more than 2/3; ③ It is better to use more than 3 generations of amblyopia devices because of the strong anti-myopia function; ④ 2 generations of amblyopia devices + hyperopia lenses can also be used to prevent astigmatism from turning into myopia. Third, the relationship between astigmatism and visual acuity: 100 degrees down 1 row, 200 degrees down 2 rows, and so on. If there are 300 degrees of astigmatism (when the amblyopia is cured), you can see more than 0.9 (1.5 minus 3 rows) without wearing a mirror. Four, astigmatism amblyopia wearing time: 1, all day wearing, when wearing when not wearing or peeking from above the glasses are invalid. 2, farsighted astigmatism 100 degrees to wear 1 year, 200 degrees to wear 2 years, and so on. 3, myopic or mixed astigmatism Features: easy to become myopic, need to prevent myopia. ① Wear glasses until 9 years old or older, and thereafter only when looking at the blackboard and watching TV, but not during the week. ② Use eye dilatation resonator: a. It can reduce eyelid pressure flattening cornea and promote cornea to become garden, thus relieving astigmatism; b. It can loosen ciliary muscle regulation and promote eye axis shortening, slowing down myopia development.