Vision is usually fixed between the ages of 18 and 20, and myopia will not increase very much after that time, if at all. If myopia increases by more than 100-200 degrees or more per year in adulthood, it is important to guard against the presence of other eye diseases. Most vision loss in childhood is due to refractive error. The first thing you need to do is to get a new pair of glasses. 18-20 year olds usually have their vision fixed, so even if myopia deepens after that, it won’t be very bad. If your myopia rises by more than 100-200 degrees or more each year as an adult, you should guard against the presence of other eye diseases. Progressive myopia (malignant myopia), cone cornea and chronic glaucoma all show signs of vision loss, but they are far more dangerous than refractive error and must be screened for as early as possible. NO.1 Malignant myopia Experts say that progressive myopia, also known as “malignant myopia”, is a lifelong development of myopia, the number of degrees has been increasing, related to genetics, eye development. Most of the patients are highly (>600 degrees) or super highly (>1000 degrees) myopic, some even reach 2000 or 3000 degrees. Hazards: These patients are prone to fundus complications such as fundus hemorrhage, glaucoma and retinal detachment, and are at risk of losing their eyesight. Treatment: Pay attention to eye protection, regular eye examinations, timely detection and treatment of possible complications. Posterior scleral reinforcement may slow down the development of myopia in some patients. NO.2 Cone cornea “Cone cornea” is a developmental eye disease. It is thought to be caused by an enzyme abnormality that reduces the strength of the cornea against pressure, thus causing the cornea to protrude forward. It is characterized by increased myopia, which can progress by several hundred degrees a year, and irregular astigmatism, which can be corrected by glasses at first, but progresses to the point where even glasses do not work. Hazards: Severe cone corneas can cause corneal edema and rupture. Treatment: Early wearing of rigid corneal contact lenses can stop the development of cone corneas and improve vision, but patients with severe cone corneas must undergo corneal transplant surgery. NO.3 Chronic glaucoma Chronic glaucoma originates from abnormal atrial angle structure causing obstruction of atrial aqueous outflow channels, which leads to increased intraocular pressure and damage to the optic nerve. Excessive eye use and high myopia can increase the incidence of this disease. This type of eye disease causes successive visual field defects in both eyes, but most patients do not feel it in the early stage, and it may be detected during physical examination, but it is often in the middle to late stage. Hazards: If early treatment opportunities are lost, the optic nerve atrophy occurs, and from the current medical point of view it is impossible to restore visual function, and the person becomes blind without realizing it. Treatment: There are two methods: medication and surgery. Drugs are used to reduce atrial fluid production or increase atrial fluid drainage to reduce intraocular pressure. Surgery is to drain the atrial fluid to lower the pressure in the eye. Experts remind 1, adults with high myopia and rapid development of myopia should go to the hospital for optometry, slit lamp, intraocular pressure and fundus examination to exclude related eye diseases. 2, adolescents and even young people should develop good eye habits, not only for the present, but also for the future. Experts say that many older eye diseases are related to the eye and lifestyle habits of young and middle-aged people, such as high myopia and excessive eye use are prone to cataracts; too much greasy diet, often poor rest is prone to age-related macular degeneration; eat more, exercise less people have a high incidence of diabetic retinopathy.