Abstract: ametropia with myopia degree greater than 600 degrees (children > 400 degrees) is called high myopia. Because most of these myopia have ocular pathological changes, high myopia is equivalent to pathological myopia or degenerative myopia.
According to the survey, there are more than 5 million blind people and nearly 10 million people with low vision in China, especially among children and adolescents. The incidence rate of primary school myopia is 22.78%, 55.22% for middle school students and 70.34% for senior high school students, according to ancient Chinese literature search. What is more shocking is that a survey report said that more than 300000 people in China have been blinded by high myopia. Therefore, the prevention and treatment of myopia in children and adolescents is more and more concerned by students, parents and society.
many people think that after myopia, it’s good to wear glasses.
do not know that if it is pathological myopia, not only the degree continues to rise, leading to the decline of vision, but also many complications and serious blindness.
occurs earlier (it can occur between the ages of 5 and 10), and it has made rapid progress. It continues to develop after the age of 25. The degree of myopia can reach more than 1500 degrees, often accompanied by fundus changes, and vision is not easy to correct. It is also called degenerative myopia. It is an eye disease characterized by progressive deepening of diopter, continuous growth of ocular axis, progressive damage to eye content and retinal choroid tissue, resulting in visual dysfunction. It is an eye disease in China One of the common eye diseases, its prevalence is about 1% ~ 2%.
ametropia with myopia degree greater than 600 degrees (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.
pathological nearsightedness features
1. The length of ocular axis is increasing, which is manifested as posterior bulge;
2. The degree of myopia increased with age;
3. Cause damage to the back of the eyeball, retina and choroid.
so ~ if you are a high myopia with more than 600 degrees, the degree continues to rise, the eyeball becomes protruding, and the face value plummets, then you are likely to be pathological myopia. You’d better go to the eye hospital for examination regularly, so as to find eye lesions in time.
pathological myopia harm
pathological myopia & high myopia is often accompanied by many serious complications
vitreous lesions: due to the extension of ocular axis and the enlargement of vitreous cavity, vitreous progressive degeneration is promoted, followed by liquefaction, turbidity and posterior detachment.
cataract: the lens can also be affected due to abnormalities such as intraocular blood circulation disorder and tissue degeneration, mainly manifested as lens opacity.
glaucoma: combined with open-angle glaucoma is six to eight times more than normal eyes, and the proportion of normal tension glaucoma and suspicious glaucoma is also significantly higher than that of other people.
macular lesions: common macular hemorrhage, macular degeneration and macular hole.
subretinal neovascularization: the incidence is 5% – 40%. It is manifested as subretinal neovascularization in the posterior pole, causing bleeding and affecting vision.
retinal detachment: it is a common complication of high myopia, with an incidence of eight or ten times that of other people. Myopia accounts for more than 70% of primary or rhegmatogenous retinal detachment. Scleral staphyloma after
: the incidence was 77.1%. The main manifestations were posterior expansion of the posterior pole of the eyeball, degeneration and atrophy of the optic nerve and perimacular retina, and decreased corrected visual acuity. The higher the degree of myopia, the higher the incidence of posterior scleral staphyloma.
retinal atrophy, degeneration, hemorrhage and hole: due to factors such as lengthening of ocular axis and posterior scleral staphyloma, patients with high myopia are prone to retinal degeneration and hole, causing hemorrhage and retinal detachment, leading to blindness.
strabismus: due to abnormal regulation and collection functions and maladjusted relationship, it is often accompanied by recessive exotropia or dominant exotropia.
amblyopia: due to low vision High myopia above
in amblyopia caused by dysregulation of convergence can cause many serious complications. Most of
will cause blindness.
are one of the common causes of blindness in adults.
account for the sixth place in blinding diseases in China, High myopia (pathological myopia) is hereditary. From the perspective of chromosome genes, “some studies have shown that the occurrence of high myopia in China is autosomal recessive inheritance, that is, both parents are high myopia, and 100% of their children are high myopia; one parent is high myopia, and 50% of their children are high myopia”
Therefore, pathological myopia and high myopia are not only caused by acquired bad eye habits, but also by congenital genetic factors. In order to prevent the complications caused by high myopia, in addition to developing good eye habits and controlling the growth of degree, patients with high myopia must have a detailed eye health examination every year, find eye lesions in time and take scientific treatment methods.