Astigmatism has the potential to change with development, and long-term improper eye posture or physiologic factors can also lead to changes in a patient’s astigmatism. Astigmatism is a refractive state in which the refractive power of the eye is different at different meridians, forming two lines of focus and a minimal diffuse spot. The general population have more or less astigmatism, because the upper and lower eyelids on the cornea of the existence of the pressure, and with the growth and development of long-term physiological pressure will appear vertical refractive power than the horizontal refractive power of astigmatism is greater. And in the process of growth and development, such as side-lying position to look at the cell phone and other inappropriate eye posture, long-term this posture on the side of the eye pressure will gradually aggravate astigmatism. Therefore, whether it is growth and development or other behaviors that have an impact on the eyes, may lead to the patient’s astigmatism degree or axial changes. It is recommended that patients with significant astigmatism should seek medical attention to evaluate their condition and follow the doctor’s instructions for treatment.