Why is myopia prevention and control so difficult? Why visual training?

Abstract: eyes with high myopia do not wear glasses, so there is no clear pattern on the retina. The eyeball continues to grow in order to find a clear pattern. The eyes with low degree wear glasses too early, so that the eye muscles are over adjusted again when looking close, resulting in the continuous growth of degree. Many people in

have had personal experience. It seems that they have avoided all the factors that they know can lead to vision deterioration, but they still can’t control vision deterioration. What are the factors that are not known to readers and then damage our vision? Today, Xiaocheng summarizes the factors of vision deterioration proposed by some experts for effective prevention and control.

I. regulating spasm factors

because the eyes look near for a long time, the ciliary muscle tension of the eyes increases and develops excessively, which will slowly thicken the eye lens. When the lens thickens, the crystal diopter increases, resulting in regulatory myopia. There is no timely relaxation of crystal regulation. After long-term tension of the ciliary muscle, The muscles begin to harden and set (adjust the crystal locking state), and finally make the ocular axis grow abnormally.

2. The factors of high ocular pressure

Because the eyes look near for a long time, the adjustment of the eyes is excessive, the ciliary muscles are tense and move forward, the anterior chamber becomes shallow and narrow, resulting in an increase in intraocular pressure, which is equivalent to that of people who look near for a long time. When they look near for a long time, the intraocular pressure will rise for a long time, which will lead to congestion in the veins, softening the sclera, and abnormal growth of the ocular axis in the long run.

III. ocular muscle factors

due to the long-term view of the near side of the eye, under the regulation of the eye and under the relationship of triple movement, the excessive collection caused by excessive eye regulation, the internal and external rectus muscles in the ocular muscles press against the equator of the eye. During the collection, the internal rectus muscles exert force to make the eye converge, and the external rectus muscles should be relaxed, but due to excessive collection, The external rectus muscle still compresses the eye. Due to the reduction of over regulation, the superior and inferior oblique muscles and the optic nerve pull the posterior sclera. Under the long-term effect, it will lead to the abnormal growth of the ocular axis.

IV. crystal pressure factors

due to the long-term viewing of the near side of the eye, cause adjustment, ciliary muscle contraction and tension, so that the crystal thickens for a long time, compresses the vitreous body backward, and then compresses the retina and scleral sieve plate. Under the long-term compression, abnormal growth of the ocular axis occurs.

v. scleral nutritional factors

due to the long-term view of the near side of the eye, cause regulation, ciliary muscle contraction and tension, so that the choroid has a pulling and tension effect, the blood flow decreases, the blood volume is insufficient, and the scleral nutrition begins to decline. Under the effect of long-term malnutrition, the sclera becomes thinner and the hardness decreases, and the abnormal growth of the ocular axis occurs after the sclera softens.

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6. Hormonal factors

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hormones can cause excessive growth of organs, which has long been accepted by Da Cong, and the eyeball is also a part of human organs. In the current highly commercialized society, many crops rely on hormones to stimulate growth, such as potatoes weighing two or three kilograms, white gourd bigger than people, etc, Including some pigs that can be slaughtered in three months, chickens that can be made into meat in one month, etc. some hormones will still remain in these foods, and these hormones will cause abnormal growth of body organs after their precipitation reaches a certain value through long-term consumption.

7. The macular area lacks nutritional factors

the eye is a convex lens that gathers all external objects onto the retina, just as we can light paper with a magnifying glass in the sun. Gathering all external things together will also produce heat, and excessive temperature will make the retina uncomfortable, In the process of converging light to the retina through the eyeball, some heat will be absorbed in the macular area, and about 85% of the composition of the macular area is lutein. Lutein is produced by green vegetables through photosynthesis. Today’s vegetables grow in greenhouses, with insufficient sunlight and short growth cycle, resulting in insufficient lutein content in vegetables, Some of our children are picky about food, which weakens the protective function of the macular area due to insufficient lutein. After excessive heat reaches the retina, the retina can’t stand such high temperature and grows backward protectively, resulting in excessive growth of the ocular axis.

VIII. Improper use of glasses factors eyes with high degree of

do not wear glasses, so that there is no clear pattern on the retina, and the eyeball continues to grow in order to find a clear pattern. The eyes with low degree wear glasses too early, so that the eye muscles are over adjusted again when looking close, resulting in the continuous growth of degree. The retina retreats protectively due to excessive heat, but we do not supplement nutrition. We only wear a pair of glasses for the eyeball, so that the heat converges to the retina again, and the retina retreats protectively again, resulting in the continued growth of the ocular axis.

IX. genetic factors

premature infants, one of the parents has high myopia, etc. may lead to the insufficient reserve value of hyperopia at birth. Many parents blindly pursue vision 1.0. Even when the child has a physical examination before entering the kindergarten, he urgently asks for a doctor everywhere if his vision is less than 1.0, as Xiaobian said in his previous article, The normal visual acuity of children under the age of eight is multiplied by their age by 0.2. When they enter the park, they are usually three years old, that is, 0.2×3 = 0.6. If their visual acuity exceeds 0.6, children will have 100% myopia. Do not think that premature face-up is a good phenomenon. People’s eyes will deteriorate at least 300 degrees from birth to adulthood because of normal body development, excessive eye use, stimulation and other factors, In other words, when a child is born with 300 degrees of hyperopia, the child’s eyes just become serious when they deteriorate by 300 degrees in adulthood. If they deteriorate by 300 degrees prematurely, the child will develop into the field of myopia in the next few days and can’t be cleaned up. Many parents think that when the child is three or four years old, his eyesight is about 1.0. They are very happy, I think my myopia is not inherited to the child. In fact, the heritability of myopia is very high. One of the parents is highly myopic, and the hyperopia reserve of the child at birth will be less than 300 degrees.

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are far from the factors that have been put forward by industry experts. Protecting eyesight is a long way to go, not because there are too many factorsThe more factors, the more we have to find ways to protect our eyesight. Because most parents are not professional, we must go to professional visual protection institutions in time.