Abstract: myopia refers to a refractive state in which the focus falls in front of the retina after the parallel light is bent through the refractive system of the eye without adjustment. So myopia can’t see the distant target. If the target is gradually moved closer to the eye and the light emitted is scattered to a certain extent to the eye, the focus will move backward. When the target is moved closer to a certain point in front of the eye., Many teenagers feel that wearing glasses brings a lot of inconvenience to life and study, which not only affects the appearance, but also may affect their career choice and future in the future. Many young friends and parents want to know how myopia occurs, whether it can be prevented, what to do once it occurs, and how myopia is formed. In a word, on the basis of heredity, it is caused by the adverse effects of the external environment and the non-standard and unsanitary use of eyes in the process of eye development. After years of research, the medical community has found that the incidence of myopia has a certain law. First, racial, black people have fewer myopia, and fewer white people. Incidence rate of Jews and yellow people is high. Secondly, the incidence of myopia is closely related to age. Children before the age of 6 have less myopia. Myopia increases after entering school age, and myopia is most likely to occur in adolescence; Thirdly, the incidence of myopia is related to heredity. Many geneticists believe that myopia belongs to autosomal recessive inheritance. Myopia can be roughly divided into two types: simple myopia and pathological myopia. Among them, the former accounts for a large proportion of myopia, is greatly affected by the environment, and the degree is small, which can be prevented; The latter accounts for a small proportion, and heredity is the main reason. Generally, it occurs early, has a high degree, develops continuously in its life, and is not easy to prevent., How to prevent the occurrence of simple myopia? To prevent the occurrence of simple myopia, the key is to pay attention to reducing the use of eyes at close distance for a long time, such as reading, reading newspapers, writing, computer work, playing games, etc. In addition, we should improve the writing conditions (clear handwriting and white paper) and learning conditions (clear printed matter and standard font); the posture is correct when reading (the working distance of the eye is 33cm), the light should not be too bright or too dark; the brightness and color of TV are moderate when watching TV; you can look far in the gap between close work to alleviate eyesight fatigue; actively participate in outdoor activities on weekdays; ensure adequate sleep; combine work and rest, balance diet and reasonable nutrition. There are three conventional schemes for dealing with juvenile myopia. The first is the natural recovery method, which advocates correcting children’s bad habits and achieving the purpose of natural recovery of vision by strengthening daily protection. This method is effective for myopic patients in marginal state; For most myopia over 100 degrees, the effect is not good. With the gradual aggravation of schoolwork, myopia will become more and more serious. The second is the matching method, which advocates the matching correction of myopia patients with more than 100 degrees, so as to inhibit the decline of vision. Clinical results show that if most patients do not wear glasses, their visual acuity will drop by about 100 degrees every year. In less than a few years, they will become hundreds of degrees of high myopia, and some even develop into strabismus and amblyopia, so that the corrected visual acuity with glasses is less than 0. 8. It limits the space for job selection such as employment and joining the army. Third, instrument treatment. In recent years, excimer laser surgery has been accepted by most myopia patients, and the effect is also relatively good., The eyeball is like a plastic capsule filled with water. Calcium plays an important role in maintaining the normal hydraulic state of the capsule. If the calcium intake is insufficient, it will cause abnormal eye development and cause the formation of myopia or the increase of myopia degree. Generally, normal people need about 800-1000mg of calcium per person per day, especially teenagers. Milk, beans, animal bones and other foods are indispensable in their daily diet to supplement calcium at any time., In addition, some experts pointed out that the lack of trace element chromium in the body has a certain relationship with the formation of myopia. Chromium is one of the trace elements necessary to maintain human health. It is an indispensable and efficient catalyst for the synthesis, absorption and utilization of sugar, protein and fat. The demand for chromium is often greater in adolescents in the period of vigorous growth and development than in adults. Chromium mainly exists in animal liver, beef, corn, bread, brown sugar and other foods. Some parents don’t pay attention to food matching and eat some fine food for their children for a long time, resulting in serious chromium deficiency in the body, resulting in changes in blood osmotic pressure of the body, which in turn leads to changes in osmotic pressure of the lens of the eye, making the lens convex, increasing diopter and producing myopia., In addition, teenagers like sweets. Eating too much sugar may make the blood sour in the body, resulting in insufficient blood calcium, weakening the elasticity of the eye wall, lengthening the eye axis and sowing the hidden danger of myopia. What needs to be supplemented is that the lack of vitamin B1 in the human body will also promote the occurrence and deepening of myopia., The lack of nutrition caused by inappropriate diet is also one of the important reasons for the occurrence and development of juvenile myopia. Teenagers should eat more fish, oranges, grapes, tomatoes, carrots and other meat, fruits and vegetables rich in vitamins ad, a, C and B1.,
many teenagers feel that wearing glasses has brought a lot of inconvenience to life and study, which not only affects the appearance, but also may affect their career choice and future in the future. Many young friends and parents want to know how myopia occurs, whether it can be prevented, what to do once it occurs, and how myopia is formed. In a word, on the basis of heredity, it is caused by the adverse effects of the external environment and the non-standard and unsanitary use of eyes in the process of eye development. After years of research, the medical community has found that the incidence of myopia has a certain law. First, racial, black people have fewer myopia, and fewer white people. Incidence rate of Jews and yellow people is high. Secondly, the incidence of myopia is closely related to age. Children before the age of 6 have less myopia. Myopia increases after entering school age, and myopia is most likely to occur in adolescence; Thirdly, the incidence of myopia is related to heredity. Many geneticists believe that myopia belongs to autosomal recessive inheritance. Myopia can be roughly divided into two types: simple myopia and pathological myopia. Among them, the former accounts for a large proportion of myopia, is greatly affected by the environment, and the degree is small, which can be prevented; The latter accounts for a small proportion, and heredity is the main reason. Generally, it occurs early, has a high degree, develops continuously in its life, and is not easy to prevent.
how to prevent the occurrence of simple myopiaThe key to the occurrence of pure myopia is to minimize the use of eyes at close range for a long time, such as reading, reading newspapers, writing, computer work, playing video games, etc. In addition, we should improve the writing conditions (clear handwriting and white paper) and learning conditions (clear printed matter and standard font); the posture is correct when reading (the working distance of the eyes is 33cm), the light should not be too bright or too dark; the brightness and color of the TV are moderate when watching TV; you can look far in the gap between close work to alleviate eyesight fatigue; actively participate in outdoor activities on weekdays; ensure adequate sleep; combine work and rest, balance diet and reasonable nutrition.
There are three conventional schemes for dealing with juvenile myopia. The first is the natural recovery method, which advocates correcting children’s bad habits and achieving the purpose of natural recovery of vision by strengthening daily protection. This method is effective for myopic patients in marginal state; For most myopia over 100 degrees, the effect is not good. With the gradual aggravation of schoolwork, myopia will become more and more serious. The second is the matching method, which advocates the matching correction of myopia patients with more than 100 degrees, so as to inhibit the decline of vision. Clinical results show that if most patients do not wear glasses, their visual acuity will drop by about 100 degrees every year. In less than a few years, they will become hundreds of degrees of high myopia, and some even develop into strabismus and amblyopia, so that the corrected visual acuity with glasses is less than 0. 8. It limits the space for job selection such as employment and joining the army. Third, instrument treatment. In recent years, excimer laser surgery has been accepted by most myopia patients, and the effect is also better.
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eyeballs are like a small plastic capsule filled with clear water. Calcium plays an important role in maintaining the normal hydraulic state of this capsule. If the calcium intake is insufficient, it will cause abnormal eye development and cause the formation of myopia or the increase of myopia degree. In general, normal people need about 800-1000mg calcium per person per day, especially teenagers. They need milk, beans, animal bones and other foods in their daily diet to supplement calcium at any time.
in addition, some experts pointed out that the lack of trace element chromium in the body has a certain relationship with the formation of myopia. Chromium is one of the trace elements necessary to maintain human health. It is an indispensable and efficient catalyst for the synthesis, absorption and utilization of sugar, protein and fat. The demand for chromium is often greater in adolescents in the period of vigorous growth and development than in adults. Chromium mainly exists in animal liver, beef, corn, bread, brown sugar and other foods. Some parents do not pay attention to food collocation and eat some fine food for their children for a long time, resulting in serious chromium deficiency in the body, resulting in changes in the blood osmotic pressure of the body, which in turn leads to changes in the osmotic pressure of the lens of the eye, which makes the lens convex, increases the diopter and produces myopia.
in addition, teenagers like sweets. Eating too much sugar may make the blood in the body acidic, resulting in insufficient blood calcium, weakening the elasticity of the eye wall, lengthening the eye axis and sowing the hidden danger of myopia. What needs to be supplemented is that the lack of vitamin B1 in the human body will also promote the occurrence and deepening of myopia.
improper diet leads to the lack of nutrition, which is also one of the important reasons for the occurrence and development of juvenile myopia. Teenagers should eat more fish, oranges, grapes, tomatoes, carrots and other meat, fruits and vegetables rich in vitamins ad, a, C and B1.
we believe that as long as we use our eyes in a standardized and hygienic way and eat reasonably, our “window of mind” will be brighter and more beautiful.