In developed countries such as the United States, Japan, South Korea and so on. , often used to improve vision, prevent poor vision and improve visual quality. In addition to treating eye diseases, using glasses and improving visual ability is also a science.

In Huangdi Neijing, the earliest classic work of traditional Chinese medicine, it is regarded as an important means of health preservation.

Xu Wenbi, a famous doctor in the Qing Dynasty, stated in "Timing Fax" that turning your eyes left and right seven times can keep your eyes bright, cure eye diseases and ear diseases, remove summer heat and clear your heart, never suffer from eye diseases, and read intensive books at night. Therefore, the method of eye movement is also the method used by modern science for eye health. It is a method of eye protection training, which is consistent with the spirit emphasized by traditional Chinese medicine.

Visual function and visual quality are closely related to our daily life. Such as visual fatigue, headache caused by visual defects, difficulty in continuous fixation, and reverse order. All of them are related to visual function and can be effectively alleviated through training. Training is an essential part for students who are nervous about their studies and overuse their eyes.