Abstract: in medicine, myopia is divided by degree, Ametropia with a degree greater than 600 degrees (children > 400 degrees) is called high myopia, because this kind of myopia often has pathological changes in the eyes; ultra-high myopia with a degree greater than 900 degrees is also called pathological myopia. The cause of high myopia is not clear, and the occurrence of pathological myopia is closely related to heredity.
Vision problems are not terrible. As long as they can be found and intervened in time, they can be controlled. What is really terrible is the blinding eye disease we did not expect – high myopia retinopathy, that is, pathological myopia.
high myopia is so harmful? Many people said it was incredible. In view of the problems generally concerned by patients, let’s see what doctors say!
what is high myopia?
in medicine, myopia is divided by degree, Ametropia with a degree greater than 600 degrees (children > 400 degrees) is called high myopia, because this kind of myopia mostly has ocular pathological changes; ultra-high myopia with a degree greater than 900 degrees is also called pathological myopia. The cause of high myopia is not clear, and the occurrence of pathological myopia is closely related to heredity. The acquired environment plays an important role in the pathogenesis of myopia.
Why can high myopia cause blindness?
almost all high myopia have the phenomenon of axial growth and posterior sclera thinning. The main pathological changes are the atrophy and thinning of retina and choroid, which are aggravated year by year, resulting in many serious complications. Such as retinal detachment and fundus hemorrhage may cause blindness.
will myopia continue to increase in adulthood?
the anterior and posterior diameter of the eyeball is the axis of the eye, which will change. After adulthood, the axis of the eye will basically develop stably. With the growth of age and improper eye habits, there will be certain degenerative diseases. Most people will have presbyopia and cataract in the middle and old age, and a few people will have low myopia in adulthood due to living and working habits.
but for people with high myopia, their visual acuity has been changing, the ocular axis is growing, and even irreversible consequences will occur due to improper use of eyes.
eye axis will change. What’s the matter?
myopia is divided into axial myopia and curvature myopia. Most of the clinical myopia is axial myopia. The normal eye axis is 24mm and 28 ~ 30mm. The eye axis of high myopia will be longer.
curvature myopia is myopia caused by the increase of the curvature of the cornea or lens. For example, diabetic patients will suffer from myopia due to fluctuations in blood glucose level. Another example is that pregnant women will change their whole body water balance due to hormone changes during pregnancy, resulting in high water content of lens and myopia. Most of them will change after production.
can retinal detachment caused by high myopia be prevented?
retinal detachment is divided into three processes:
retinal degeneration. At this time, most people don’t feel it, but occasionally there will be a “dark shadow” in front of them.
form retinal holes. At this time, there was still no feeling. Maybe the “dark shadow” appeared more frequently, with a flash like lightning.
when the gelatinous vitreous is liquefied, it will enter the retinal hole, resulting in retinal detachment from the original tissue.