High myopia is generally defined as myopia of more than 600 degrees, which is a dangerous condition because of some strenuous or extreme sports that may lead to complications. If the diving is done in shallow water, there is usually not much problem, but if it is done in deep water, such as below a few meters or dozens of meters, this situation will affect the environment inside the eye, and in serious cases, it may lead to the emergence of retinal detachment, so it is generally not recommended to do deep-water diving for patients with high myopia. In addition to deep water diving, other extreme or strenuous sports are also not recommended, such as playing soccer, basketball, bungee jumping, which may also lead to complications. Once a retinal detachment occurs in the eye, vision will also be very seriously affected, and even after surgery, it is difficult to return to normal, so it is important to pay attention to this problem.