Abstract: the abnormal nutritional metabolism in myopia changes the capsular permeability of the lens, and the lens is gradually turbid due to nutritional and metabolic disorders. The visual acuity is gradually reduced, resulting in complicated cataract. This kind of cataract develops slowly, mainly core opacity and posterior capsule opacity.
high myopia refers to ametropia with myopia degree greater than 600 degrees, accompanied by degenerative diseases such as axial elongation, fundus retina and choroid atrophy. High myopia can cause many serious complications, most of which will cause blindness. It is one of the common causes of blindness in adults, accounting for the sixth place in blinding diseases in China. The main consequences are:
1 The incidence of
in posterior scleral staphyloma 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.
2. Retinal atrophy, degeneration, hemorrhage and hole
due to the lengthening of ocular axis, posterior scleral staphyloma and other factors, patients with high myopia are prone to retinal degeneration and hole, causing hemorrhage and retinal detachment, leading to blindness.
3. Subretinal neovascularization
show subretinal neovascularization in the posterior pole, causing bleeding and affecting vision.
4. Retinal detachment
are the most common complications of myopia. Due to axial elongation and intraocular dystrophy in myopia, cystic degeneration and lattice degeneration often occur around the retina. The retina in the degenerative area is very thin and prone to perforation. Some have been perforated and formed in sexual holes. In addition, vitreous liquefaction and increased mobility lead to retinal detachment. In retinal detachment, 70% are myopia.
myopia has abnormal intraocular nutrition metabolism, which changes the capsule permeability of the lens, gradually produces turbidity due to lens dystrophy and metabolic disorder, and gradually reduces vision, resulting in concurrent cataract. This kind of cataract develops slowly, mainly core opacity and posterior capsule opacity.
myopia have abnormal filter curtain structure at the atrial angle, so the outflow resistance of aqueous humor is large, which is easy to cause the increase of intraocular pressure. According to statistics, 30% of high myopia have glaucoma, which will cause the gradual loss of vision.
have many complications due to high myopia, some complications need to be treated in time, and some complications such as retinal degeneration and holes need preventive laser treatment to prevent blindness. Therefore, patients with high myopia should often check the fundus and intraocular pressure, so as to achieve early detection and early treatment.