When the retina detaches from the wall of the eye, we call it retinal detachment. High myopia leads to retinal detachment for four reasons: 1, because the eye not only becomes larger and longer – the sclera is constantly expanding, while the retina is fixed in area after maturation, with the expansion of the sclera on the outer wall of the eye, the retina will be pulled thinner and thinner, and the thin retina is easily torn, leading to retinal fissures, thus producing fissured retinal detachment. 2, high myopia is closely related to genetics, and its peripheral vitreoretinal often has abnormal development, such as retinal degeneration, vitreous spots, etc. 3, vitreous liquefaction, the gyratory force of the liquefied vitreous movement and residual vitreous traction are also one of the causes of retinal detachment. 4, high myopia due to the continuous thinning of the sclera, the eye is getting bigger and bigger, and the posterior vitreous swelling is becoming more and more obvious, and at the same time, due to the liquefaction and degeneration of the vitreous, the proliferating membrane is produced in front of the retina. The presence of these two different directional forces, which produce traction, can produce localized traction retinal detachment in the posterior pole. What should I pay attention to in high myopia? 1, try to avoid myopia deepening: usually reading books pay attention to the posture and reading distance, reading books can not last too long, every 45 minutes should let the eyes rest 15 minutes. Control the time to look at the computer, cell phones, do not let the eyes overworked. Especially game consoles and cell phones. Encourage patients to take part in more outdoor activities and see more trees, flowers and other green plants. Patients should get out of the building group and look at the far end of the field of vision. 2.Reasonable and balanced diet: There is no special medicine for high myopia, so a reasonable diet is especially important. 3, regular check-ups: If a family member has high myopia or retinal detachment, the frequency of visits to the doctor should be increased, and if there are no special circumstances, the fundus should be checked at least once a year. According to the doctor’s examination feel whether to do the laser prevention treatment of the fundus. 4.Appropriate exercise: avoid head rushing sports, such as diving, soccer sports, basketball sports, etc.