Retinal detachment is one of the more serious and common blinding eye diseases. Retinal detachment is most common in people between the ages of 40 and 70, and has been on the rise among younger people in recent years. The retina is a translucent membrane inside the eye that is important for sensing light information from the outside world and is located at the bottom of the eye. Retinal detachment is the separation of the retinal neuroepithelial layer from the pigment epithelial layer. The causes of retinal detachment can be categorized as secondary or primary. Primary retinal detachment refers to fissure retinal detachment, which occurs on the basis of retinal fissure formation, and the cause of the onset is related to age, heredity, high myopia, vitreous liquefaction, etc.; secondary retinal detachment is mostly caused by trauma, localized severe inflammation of intraocular tissues, tumors, and proliferative retinopathy. First, the main factors of retinal detachment 1, myopia: myopia is easy to produce vitreous degeneration and after detachment. The fragility of peripheral retina in myopic eyes and the vitreoretinal traction can easily lead to retinal detachment. 2, aphakic eyes: cataract surgery with vitreous complications are particularly vulnerable to retinal detachment. 3, age: the elderly vitreous degeneration, liquefaction, often accompanied by a variety of retinal degeneration, thus prone to retinal detachment. 4, retinal degeneration: some retinal degeneration, such as lattice-like degeneration, frost-like degeneration, paving stone-like degeneration, especially prone to the formation of retinal detachment. This is because the degeneration reduces the adhesive force of the retina and reduces the resistance to traction. 5, trauma: in contusion, the moment of impact movement can make the eyeball temporarily deformed, easy to produce retinal serrated edge detachment. Perforating trauma can directly cause retinal detachment, and late vitreous proliferation can lead to traction net detachment. Second, what are the symptoms and harm of retinal detachment Retinal detachment has early symptoms, only early detection, early treatment. Early symptoms of retinal detachment are: 1, mosquito and flash: the earliest. Middle-aged and old people, especially highly myopic patients, suddenly appear a lot of flying mosquitoes, a certain direction of continuous flash, should be alert to the possibility of retinal detachment. 2.Decrease in central vision: retinal detachment in the posterior pole part of the retina, vision decreases sharply. Early detachment of the peripheral part of the retina has no or very little effect on the central vision. Similarly, the fundus should be examined in detail in high-risk patients with vision loss. 3.Distortion of vision: When peripheral retinal detachment affects the posterior pole or shallow detachment occurs at the posterior pole, there will be distortion of vision in addition to the decrease of central vision. 4, visual field defects: when retinal detachment, some sensitive patients can find visual field defects. Retinal detachment is a serious blinding eye disease, which can lead to eye atrophy. Third, the high-risk group of retinal detachment 1, myopia, especially more than 600 degrees of high myopia patients. 2.Elderly people, especially in the process of vitreous degeneration and liquefaction. If one eye has retinal detachment, the other eye is also prone to retinal detachment. 4, Combined with other diseases of the eye: eye trauma, vitreous hemorrhage, diabetic retinopathy, etc.. 5.Patients with a history of internal eye surgery (such as cataract removal) and YAG laser post-capsulotomy.