Many parents believe that playing ping pong can regulate myopia fatigue and slow down the development of myopia. The theory of myopia is that spasm and fatigue of the ciliary muscles of the eyes lead to over-adjustment and over-adjustment lag, and gradually develop into myopia, and many clinical studies now verify the importance of sports, especially eye muscle exercise and whole body outdoor activities, to enhance eye and physical and mental health development. It is very important to exercise. Exercise cannot be just a part of muscle exercise, it is better to exercise as many muscles as possible, because the purpose of human exercise is to fitness, eye exercise is to healthy eyes, some muscles do not participate in long-term exercise will be a problem. Because often under the microscope surgery, resulting in hidden pain in the back of the neck from time to time, there was a period of time, how uncomfortable the shoulder is uncomfortable, what position is difficult, so, and closed, and plaster, acupuncture, fire cupping all on, and finally also find Chinese medicine massage, but also not too effective, and then remembered that it is a long time low surgery caused by the cervical spine bending stiffness, and then go swimming every day after work, only gradually stiff muscles Only then did the stiff muscles gradually pull apart and the hidden pain in the back of my neck slowly recovered. This experience taught me that I should let more muscles participate in sports, and not let them sit idle, and that the law of use is in, and not use is in. Nowadays, many sports are often just one or a few limb exercises. For example, the popular jogging, walking, etc., the main exercise is the legs, the muscles involved are really limited. The table tennis is different, the surface of the table tennis is the movement of the hands, but the requirements of the pace is very high, about speed, about explosive force, the process of playing, but also the process of continuous running, the movement of the legs is needless to say, but also requires the waist strength, and the direction of these limb movements, the form, strength and different, some require abduction, some require inward, some must be straight, some best bent, due to The rapid movement of the table tennis also has a greater requirement for eye regulation and a direct increase in the sensitivity of the response. Reverse beat: also known as double-sided adjustment trainer (also known as double-sided mirror) is developed using the principle of adjustment, specifically for improving and increasing the speed and accuracy of eye adjustment tools. It can improve the speed of eye muscle adjustment, increase the amplitude of adjustment, effectively improve the adjustment lag and adjustment function deficiency and other problems. The double-sided mirror is widely used for myopia, hyperopia, strabismus, presbyopia and amblyopia, and is widely recognized by experts as a complementary appliance. Both teenagers and adults, the elderly, can use and have a good exercise effect. You only need to train for 20 minutes to half an hour a day to achieve the exercise effect. This product can prevent the occurrence of adolescent pseudomyopia, control and delay the development of adolescent true myopia, and has obvious efficacy for early presbyopia and regulatory visual fatigue. The double-sided mirror can also work as an examination of the flexibility of human eye regulation.