The axial position of the eye is normally 0 to 180 degrees. Axial position is the way astigmatism is represented on the cornea, and a normal person will not have degrees. For example, if the astigmatism is 100 degrees, the astigmatic axis is at 30 degrees, and the axial position is this astigmatic axis. Astigmatism axis is generally 0~180 degrees can be, normally there is no degree, if there is a degree belongs to corneal astigmatism. Astigmatism is a problem of corneal curvature, can be divided into regular astigmatism and irregular astigmatism, regular astigmatism, corrected visual acuity can be improved, irregular astigmatism corrected visual acuity does not improve, you should also exclude cone corneal problems. Astigmatism occurs mainly due to congenital genetic factors and acquired factors. Acquired factors are seen in eye trauma, eye surgery, and eye lesions. When astigmatism occurs, you should go to the hospital for a serious examination, which should not be ignored, especially in adolescents. According to the examination, the symptomatic treatment.