With the widespread use of electronic products such as computers and cell phones, the number of people with “myopia” is getting larger and larger. Myopia not only brings inconvenience to people’s daily life, but also causes a series of diseases, such as retinal detachment, when “high myopia exceeds 600 degrees. In high myopia, the internal structure of the eye changes, and the eye gradually expands and becomes larger and longer, while the retina matures to a fixed size. A thinner retina is like a thin dress that tears easily, leading to a “hole” in the retina. The fluid in the eye can then pour through the “hole” and cause the retina to detach. Although strenuous exercise is not the same as “suffering from external forces,” when highly myopic people engage in strenuous exercise, such as riding roller coasters, diving, bungee jumping, diving downward, and making sharp turns, the instantaneous pressure on the eyeball increases dramatically – equivalent to a heavy punch to the eye, which can easily cause retinal detachment. Data show that people with high myopia of 600 degrees or more have a 7 to 8 times higher chance of retinal detachment than the average person. That’s why people with high myopia should try to avoid strenuous exercise!