Retinal detachment, referred to as “retinal detachment,” is a very common fundus disease, once it occurs, just like the camera inside the negative off, objects can not be formed in the eye image, thus causing serious vision loss. Ophthalmologists say that patients with “net loss” are usually middle-aged and elderly, but recently there is a trend toward younger people, and the incidence is gradually increasing. About 20 percent of retinal detachment patients in outpatient clinics are due to factors such as severe head impacts, high myopia, and eye trauma. How does the retina detach? The retina is like wallpaper, tightly attached to the inner wall of the eye, and can be partially detached or peeled off as a result of human damage or water seepage from the inner wall of the eye. When the vitreous humor and retina of the eye are stretched, a meteor-like discharge and flashing light may appear in front of the eyes in the early stages. If the situation continues to deteriorate and the cracks caused by the pulling are not repaired in time, the water that has been liquefied in the vitreous body has a chance to pour into the retina and bulge part of it, just like water seeping through wallpaper. Therefore, the patient will have a scenario of floating black shadows in front of the eyes, visual field defects, and dimmed vision in a certain direction. According to the survey, 1/3 of patients with primary retinal detachment also have high myopia, which means that retinal detachment can occur in highly myopic eyes. This indicates that the chances of retinal detachment in highly myopic eyes are quite high. Also, strenuous exercise, head shaking and physical work may trigger retinal detachment. Because of the continuous growth of the front and back of the eye, the retina cannot grow accordingly and is stretched. When there is too much head vibration or prolonged strenuous exercise, the vitreous vibration increases and the retina is subject to traction leading to the appearance of a fissure, and the subsequent liquefied vitreous enters the subretina, leading to retinal detachment. Experts recommend that people with high myopia should have regular eye examinations, visual acuity and optometry, and should not engage in strenuous exercise and heavy physical labor, and avoid injuries to the head (especially in and around the eye), etc. This is mainly to prevent posterior vitreous detachment to avoid retinal detachment. People at risk for retinal detachment: 1. People with high myopia, due to the elongation of the eye, the retina is stretched and thinned to easily develop a fissure. 2, engaged in eye and head impact work, such as divers, soccer players, deep water divers, boxers should pay attention to. 3.Foreign objects flying into the eyes during the work of car mechanics, repairmen, etc., can easily cause eye trauma, so labor needs to protect the eyes. 4, the net off and age has a certain relationship, more than 50 years old people due to the aging of the eye, the disease rate will therefore increase.