Abstract: high myopia refers to ametropia with myopia greater than 600 degrees, accompanied by degenerative diseases such as eye axis elongation, fundus retina and choroidal atrophy. Myopia less than 300 degrees, and between 300 and 600 degrees is called moderate myopia. How many degrees of
is high myopia?
nowadays, there are more and more people with myopia. Many people choose glasses or surgery as soon as they find their myopia. Who knows that myopia can also be divided into high myopia and moderate myopia. Different people with myopia should choose different correction methods. Then, how much is high myopia? Quzhou Yishi ophthalmologist: myopia is divided by degree, 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.
High myopia refers to ametropia with myopia greater than 600 degrees, accompanied by degenerative diseases such as eye axis elongation, fundus retina and choroidal atrophy. Myopia less than 300 degrees, and between 300 and 600 degrees is called moderate myopia.
1: causes of high myopia
with the development of society, the knowledge we need is increasing, the probability of using eyes is greatly improved, and the probability of myopia is also increasing. Myopia is divided into high myopia and ordinary myopia. The degree of ordinary myopia is generally less than 600 degrees. Myopia belongs to polygenic inheritance, that is, patients have multiple pathogenic genes, but also have the role of environmental factors. Ordinary myopia is more obvious. Environmental factors include poor lighting, bad reading and working habits, such as long-time reading and close work, eye regulating muscles are in a continuous state of tension and contraction, and then the regulating ability is weakened, resulting in myopia. But under the same conditions, not all people have myopia, and some patients with myopia do not work close, or rarely read books and newspapers. So it is the result of the interaction between the two. High myopia is considered to be caused by autosomal recessive inheritance.
II: how to treat high myopia
at present, excimer laser surgery is the most safe, effective and stable treatment for myopia, hyperopia and astigmatism.
however, for high and ultra-high myopia, ICL lens implantation has significant advantages unmatched by LASIK. ICL lens implantation is the best new choice for successful lens removal for patients with high and ultra-high myopia.
note: children should not choose surgery to correct high myopia. It is best to wear frame glasses.
III: high myopia should be checked regularly.
according to experts, high myopia is easy to lead to fundus complications. The two major causes of high myopia blindness are retinal detachment and macular atrophy. Generally speaking, for every 300 degree increase in myopia, the anterior posterior diameter of the eyeball increases by about 1 mm. Therefore, the higher the degree of myopia, the greater the risk of retinal detachment. The fundus macular area is the most accurate part of human visual acuity. If the macula is damaged, the highest visual acuity can only reach 0.1 High myopia may also have macular atrophy due to the lengthening of the eyeball, which will also lead to the loss of vision. So check the fundus regularly.