Abstract: pseudomyopia, also known as accommodative myopia, has normal axial length, but the refractive power of refractive stroma exceeds the norm, which is generally due to excessive lens adjustment. Therefore, distant light is imaged in front of the retina after entering the eye. After mydriasis, the diopter of myopia completely disappeared, manifested as emmetropia or hyperopia., Due to the rise of various electronic products, the development of the network, and the incorrect sitting posture, myopia has become a common phenomenon. You know what? Myopia can also be classified. Many nearsighted friends will wonder if there are many other classifications of myopia in addition to the degree?, At present, the most commonly used clinical method is to classify myopia according to diopter and refractive components to see what type of myopia you belong to and what you need to pay attention to., 1. According to the degree of myopia, (1) mild myopia, myopia 300 degrees 600 degrees often causes degenerative lesions of vitreous and fundus, of which > 1000 degrees and serious pathological changes of fundus are also called malignant myopia, which is mostly caused by autosomal recessive inheritance. Huiguang ophthalmology director stressed that friends with high myopia may have certain changes in the fundus. Therefore, it is best to have a fundus examination once a year to avoid strenuous exercise and prevent net detachment. Because high myopia also has certain heredity, parents with high myopia must pay close attention to the development of their children’s vision., 2. According to the refractive components, ⑴ axial myopia is caused by the excessive development of the anterior and posterior axis of the eye.,
due to the rise of various electronic products, the development of the network, and the incorrect sitting posture at ordinary times, myopia has become a common phenomenon. You know what? Myopia can also be classified. Many nearsighted friends will doubt that there are many other classifications of myopia in addition to the degree?
the most commonly used method in clinic is to classify myopia according to diopter and refractive components to see what type of myopia you belong to and what you need to pay attention to.
1. According to the degree of myopia,
(1) mild myopia, the degree of myopia is less than 300 degrees, and there are no pathological changes in the general fundus. Experts suggest that if you are a student, you can not wear glasses at ordinary times and wear them in class. At the same time, you must pay attention to using your eyes to prevent the degree from deepening further.
(2) moderate myopia: myopia > 300 degrees < 600 degrees, some fundus showed leopard like changes. Experts remind that if you belong to this stage of myopia, you must control the degree and put scientific eye use in the first place. If you develop to high myopia, it will have a great impact on the fundus and vision.
(3) high myopia: myopia > 600 degrees often causes degenerative lesions of vitreous and fundus, of which > 1000 degrees and serious pathological changes of fundus are also called malignant myopia, which is mostly caused by autosomal recessive inheritance. Huiguang ophthalmology director stressed that friends with high myopia may have certain changes in the fundus. Therefore, it is best to have a fundus examination once a year to avoid strenuous exercise and prevent net detachment. Because high myopia also has a certain heredity, parents with high myopia must pay close attention to their children’s vision development.
2. According to the refractive components
(1) axial myopia is caused by the excessive development of the anterior and posterior axis of the eye.
⑵ curvature myopia is caused by excessive bending of the cornea or lens surface.
diopter myopia is caused by high diopter of refractive stroma.
3. According to the clinicopathological
⑴ simple myopia: that is, general myopia, medium and low myopia with diopter below 600 degrees, and the progressive development of myopia is slow. The eyeball tissue was normal without pathological changes.
⑵ progressive myopia: the so-called high myopia, also known as pathological myopia, with a diopter of more than 600 degrees and a maximum of 4000 degrees. Generally, the disease occurs earlier, the axial diameter of the eyeball is continuously lengthened, and a series of pathological changes can occur in many tissues of the eyeball.
4. According to the influence of glasses regulation,
⑴ pseudomyopia: also known as regulatory myopia, the axial diameter of the eye is normal, but the refractive power of the refractive stroma exceeds the normal, which is generally due to excessive lens regulation. Therefore, distant light is imaged in front of the retina after entering the eye. After mydriasis, the diopter of myopia completely disappeared, manifested as emmetropia or hyperopia.
⑵ true myopia: also known as axial myopia, the refractive power of the refractive stroma is normal, the anterior and posterior diameter of the eye axis is prolonged, and the distant light is imaged in front of the retina after entering the eye.
⑶ mixed myopia: the state in which true and false myopia exist at the same time. After mydriasis, the diopter of myopia decreased more, but it was still myopia. Juvenile myopic students are in this state of myopia in the process of heavy learning tasks and physical development.
from these classifications, I believe everyone has further deepened their understanding of myopia, and the prevention and health care of myopia can not be ignored.