Myopia is a common eye disease, which is caused by excessive use of eyes for a long time, causing excessive contraction of eyeball muscles, deformation of retina and lens, leading to decreased vision.

Myopia is a life science, because it is related to the physiological structure of human body. It is a physiological study from the eye structure, retina, lens and other eye structures. Myopia belongs to life science and is the research content of physiology.