Abstract: the ocular axis of patients with true myopia is significantly longer than the original. According to expert analysis, the degree of myopia increases by 300 degrees for every 1mm increase in the ocular axis in patients with myopia. Generally, myopia below 300 degrees is called low myopia, those between 300 and 600 degrees are called moderate myopia, and those above 600 degrees are called high myopia.
myopia is not a strange thing now. Men, women and children almost have a pair of myopia glasses. How many do you know about the three development stages of myopia?
myopia has three development stages:
1. In the stage of pseudomyopia,
if the spasm of ciliary muscle is relieved by physical methods or other physiotherapy methods, the eyeball can return to its original state, block the development of myopia and prevent the development from pseudomyopia to true myopia. If there is no good prevention and treatment at this time, the retina will stimulate the continuous development of sclera, cause the growth of ocular axis, and gradually evolve into true myopia. General children’s vision is pseudomyopia when it is 0.6-0.8 (4.8-4.9). If parents can find and deal with it in time, they can recover completely! And pseudomyopia to true myopia is often 1-3 months. Many parents think they can delay to the hospital or visual protection store for recovery in winter and summer vacation, but unfortunately it has become true myopia! Then it will take time to correct it.
2. In the stage of true myopia,
the ocular axis of patients with true myopia increases significantly than before. According to expert analysis, the degree of myopia increases by 300 degrees for every 1mm increase in the ocular axis in patients with myopia. Generally, myopia below 300 degrees is called low myopia, those between 300 and 600 degrees are called moderate myopia, and those above 600 degrees are called high myopia. The development of myopia in young children is characterized by fast growth, with an average growth of 50 ~ 150 degrees, until the age of 18! Some have an annual growth rate of more than 200 degrees!
3. In the stage of high myopia,
young children with myopia expand their eyeballs with the increase of ocular axis, which is much larger than the normal eyeball in eye specimens. In the process of eyeball enlargement, the sclera and choroid can grow continuously according to the signal requirements inside the eye, but the retina cannot grow with it. In order to stick to the increased sclera and choroid, the retina will have many cracks or lattice degeneration around the retina, resulting in early lesions for retinal detachment in the future. There are 4 complications in
myopia. Attention should be paid to the incidence of
, cataract, glaucoma,
and high myopia. The incidence rate of open angle glaucoma is 6 to 8 times higher than that of normal persons. However, glaucoma is often obscured by symptoms of high myopia due to its clinical symptoms. High myopia with posterior pole cortical opacity of crystalline body is also common, and the dark adaptation time is relatively prolonged because the pathological changes of pigment epithelial cells in patients with high myopia affect the reaction process of photochemical changes of visual cells.
flying mosquito disease
high myopia can produce real vitreous degeneration or liquefaction, causing obvious flying mosquito disease. Consciously float the light, spark, flash or shadow in front of you.
posterior scleral staphyloma
is mainly manifested in the backward expansion of the posterior pole of the eye, which is the degeneration and atrophy of the nerve and the retina around the macula, and the decline of corrected visual acuity. The higher the degree of myopia, the higher the incidence.
retinal degeneration, hemorrhage, hole and detachment
due to the lengthening of the ocular axis, the thinning of the posterior half of the eyeball, the atrophy and degeneration of the retina and choroid, there are holes, leading to hemorrhage and retinal detachment of different ranges, resulting in visual loss. In addition, macular degeneration is also the biggest risk of high myopia, which shows visual deformation, vision decline, and eventually lead to blindness.
high myopia can’t do strenuous exercise because of complications, so it will be limited to find jobs and objects in the future. This is why young children with true myopia still need prevention and control!