Retinal detachment (professionally known as “retinal detachment”) is a relatively common eye disease, mainly seen in middle-aged and elderly people after the age of 50, and is more common in people with myopia, and at a younger age. Patients often experience flashes of light or dark shadows in front of their eyes as a precursor, and later feel a fixed dark shadow in a certain direction in front of their eyes, and then go to the hospital, where the doctor will look at the bottom of the eye and find a retinal detachment. The retina is often detached to a small extent at the beginning, if not treated in time, the detachment area will continue to expand, and even soon the whole retina is detached, and the eyesight falls sharply. Nutrition for the photoreceptor cells in the retina mainly comes from the choroid below. Once detached, the retina is like a crop plucked from the ground, and lacking in nutrient supply, the photoreceptor cells will shrivel up and become necrotic. Therefore, after a long time, even if the retina is reset after surgery, the visual function is still seriously impaired. Studies have shown that in retinal detachment causing macular detachment, the prognosis of vision is significantly better when surgery is done within 7 days than after 7 days. Therefore, once a retinal detachment is diagnosed, it is important to rush to a hospital that is equipped to perform the surgery.