How many degrees of myopia will increase the heritability?

Abstract: high myopia often develops rapidly at an early age, In adolescence (15-20 years old), there will be another development peak. Different from simple myopia, some high myopia do not stop the development of myopia even in adulthood, so some people also call it progressive myopia.

myopia is divided according to the degree, and the degree is greater than 600 degrees Ametropia in children (> 400 degrees) is called high myopia. Because this kind of myopia often has ocular pathological changes, high myopia is equivalent to pathological myopia or degenerative myopia. The cause of high myopia is unknown. The occurrence of pathological myopia is genetically related. The acquired environment plays an important role in the pathogenesis of myopia.

High myopia often develops rapidly at an early age, In adolescence (15-20 years old), there will be another development peak. Different from simple myopia, some high myopia will not stop the development of myopia even when they reach adulthood, so some people also call it progressive myopia. High myopia has been developing continuously since the early stage of myopia, so it is very likely to worsen blinding eye diseases.

In China, high myopia is an autosomal recessive inheritance, that is, both parents are high myopia, 100% of their children are high myopia, one parent is high myopia, and 50% of their children are high hereditary myopia, but some are incomplete, The main manifestations are myopia in preschool children, the degree of myopia increases progressively, and fundus retinochoroidopathy worsens year by year, resulting in many serious complications. Therefore, high myopia is also known as pathological myopia, malignant myopia, degenerative myopia, progressive myopia and hereditary myopia.

clinical symptoms of high myopia

1. Myopia develops rapidly:

high myopia often develops rapidly in childhood, In adolescence (15-20 years old), there will be another development peak. Different from simple myopia, some high myopia do not stop the development of myopia even in adulthood, so some people also call it progressive myopia.

2. Exophthalmos:

The eyeballs of high myopia increased significantly before and after, some formed posterior scleral staphyloma, deepened anterior chamber, ciliary muscle atrophy, and some people’s eyeballs were obviously prominent.

3. Dark shadow in front of eyes:

high myopia will cause vitreous degeneration, liquefaction, posterior vitreous detachment, etc. there are turbidity and floating objects in the vitreous. Patients can see flying mosquitoes, sparks and flashes.

4. Fundus changes:

arc spots can be seen next to the optic papilla, the omentum is highly leopard shaped, omental atrophy spots and macular lesions can be seen.

5. Vision loss:

high myopia can cause cataract and macular hemorrhage, which can significantly reduce vision. The most serious is retinal detachment, which can lead to blindness and eyeball atrophy.

prevention of high myopia

1. Primary prevention

develop good eye hygiene habits, write in a correct posture, don’t lie down and read, don’t read in strong light or dark places, and don’t read for too long.

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should not watch TV for a long time and can not play video games for a long time. Now many primary and secondary school students play video games with small display screens and dim light. Many children simply forget the existence of time after playing addiction, which is very harmful.

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doing eye exercises is very important for eliminating visual fatigue and protecting eyesight, and it is also a daily protection that each of us can do. However, because children are young, they generally do not recognize the importance of eye exercises, so teachers and parents should often urge their children to do exercises in place.

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encourage children to participate in outdoor activities, see more trees, flowers and other green plants, and often take children out of the buildings, so that children can look into the distance in a wide field of vision.

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should check their eyesight regularly. If they find that their eyesight decreases, they should be diagnosed and treated. If their myopia deepens, they should re optometry and glasses

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in time. 2. Secondary prevention of

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a high myopia development should prevent

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continuous close eye use for a long time. Even if they participate in outdoor activities, they should reasonably adjust collective training, At ordinary times, we should ensure adequate sleep, balanced diet, reasonable nutrition, etc. Special attention should be paid to reasonable eye use, appropriate work should be selected, excessive eye use and adverse visual stimulation should be avoided, violent exercise should be avoided, trauma, especially eye collision, so do not participate in antagonistic sports. Prevention of complications of

B the main cause of blindness caused by

high myopia is complications, such as retinopathy, glaucoma and amblyopia. In addition to paying attention to visual changes, we should also pay attention to any other abnormal phenomena in the early stage of the eye, such as flash, flying mosquito, visual field defect, progressive or sudden decline of visual acuity, And eye soreness, pain and night blindness. If necessary, other special eye examinations shall be carried out.