Abstract: high myopia is prone to complications such as scleral staphyloma, retinal deformation, retinal hemorrhage and retinal detachment. Patients with high myopia are 7-8 times more likely to have retinal detachment than normal. About 15% of myopia patients in China have complications such as retinal hole, retinal hemorrhage and retinal detachment, of which 20% of high myopia patients are blinded by such diseases.
nearly 70% of teenagers suffer from high myopia, and the trend of rapid aging is obvious.
according to the latest survey of the Ministry of education and the Ministry of health, among the 400 million myopia patients in China, high myopia accounts for 15-30% of the myopia population, of which the proportion of teenagers is as high as 67.5%, and increases at a rate of 8% every year, The myopia rate has shown a pattern of “the older the more common, the younger the age, the faster the growth rate”. Why does juvenile high myopia show a rapid increasing trend of younger age? On the one hand, nowadays, there are more and more electronic products. Teenagers playing with mobile phones, iPads and other electronic products for a long time are easy to cause eye fatigue. On the other hand, teenagers have heavy learning and less outdoor activities, which is prone to myopia.
vigilance: 20% of high myopia are blind due to pathological changes.
high myopia is prone to complications such as scleral staphyloma, retinal deformation, retinal hemorrhage and retinal detachment. Patients with high myopia are 7-8 times more likely to have retinal detachment than normal. About 15% of myopia patients in China have complications such as retinal hole, retinal hemorrhage and retinal detachment, of which 20% of high myopia patients are blinded by such diseases.
“four cases of blindness caused by high myopia:
” high myopia itself does not cause blindness, but its complications can cause blindness. ” High myopia causes blindness mainly in the following aspects:
1. High myopia causes retinal detachment and blindness
, which is the main complication of high myopia. Due to the axial elongation and intraocular dystrophy of myopia, the peripheral part of the retina often suffers from retinoid degeneration and lattice degeneration. The retina in the degeneration area is very thin and is prone to perforation. Some have been perforated to form holes. In addition, vitreous liquefaction and increased mobility lead to detachment of the traction retina. Among the patients with retinal detachment, 70% are myopia.
2. Blindness caused by high myopia complicated with macular disease
high myopia is easy to be complicated with macular disease, retinal detachment, retinal hemorrhage, blindness caused by holes, macular hemorrhage and macular degeneration. Myopia has poor eye blood supply, retinal ischemia, and the retina produces a neovascular growth factor, These factors promote the growth of new blood vessels under the retina, and the walls of these new blood vessels are very thin. Easy to rupture and bleed, and form macular hemorrhage after bleeding. After the bleeding is absorbed, the new blood vessels can rupture again and bleed again. After multiple bleeding, local scars are formed, causing macular degeneration, thus permanently damaging vision.
3. High myopia complicated with vitreous liquefaction causes blindness
when the axis of myopia increases, the vitreous will not increase again, so the vitreous can not fill all the space in the eye, resulting in condensation and liquefaction. The condensed part has high density and can have flocculent, filiform, colorless and transparent turbidity. The vitreous structure in the liquefied part disintegrates, forming a gap filled with liquid, increasing the vitreous activity, pulling the retina to separate, causing the dark shadow in front of the eyes, resulting in blindness.
4. Cataract caused by high myopia
cataract myopia has abnormal intraocular nutrition metabolism, which changes the membrane permeability of the lens, gradually produces turbidity due to lens nutritional disorder and metabolic disorder, and gradually reduces vision, resulting in concurrent cataract. This kind of cataract develops slowly, mainly core opacity and posterior membrane opacity.