High myopia is a refractive error characterized by myopia of more than 600 degrees (more than 400 degrees in children) with degenerative pathologies such as prolongation of the eye axis, retinal and choroidal atrophy and degeneration of the fundus. The danger of high myopia is not only the loss of visual acuity, but also a variety of serious blinding complications, such as retinal detachment, cataract, glaucoma, retinal atrophy degeneration, etc. It is one of the common causes of blindness in adults, second only to cataract and glaucoma. High myopia is very difficult to treat, resulting in many patients having nowhere to go for medical treatment or giving up on it. In China, high myopia is an autosomal recessive inheritance, which is manifested by the appearance of myopia in children at school age (pre-school), the gradual increase of myopia, and the aggravation of retinal chorioretinal lesions in the fundus of the eye year by year, resulting in many serious complications, such as retinal detachment, cataract, glaucoma, retinal atrophy degeneration, macular degeneration, etc., which can lead to blindness in serious cases. In addition to genetic factors, there are also environmental factors, and many patients with high myopia have a great relationship between the deepening of the degree and poor eye use. Therefore, patients with high myopia should not spend too much time in continuous near eye use; they should actively participate in outdoor activities, but should avoid strenuous exercise; they should ensure sufficient sleep, combine work and rest, and eat a balanced diet with reasonable nutrition; they should pay special attention to reasonable eye use, choose appropriate work, and avoid excessive eye use and bad visual stimulation; wearing suitable glasses will not deepen the prescription, but not wearing glasses with myopia will deepen the prescription more quickly. If you don’t wear glasses, your myopia will increase faster. High myopia fundus complications mainly include retinal lattice-like degeneration, vitreous degeneration, hole-derived retinal detachment, high myopia macular degeneration development mainly through the posterior scleral chylomegaly, neuroepithelial layer cleavage, macular cleavage, macular fissure, retinal detachment and other stages, to the retinal detachment stage is very serious, if not treated in time, not far from blindness. Therefore, patients with high myopia need to review their fundus every six months to a year when they are asymptomatic, and go to the hospital promptly when they have symptoms.