Astigmatic axial position can exist between the range of 0 to 360 degrees. Astigmatic axial position generally refers to regular astigmatism. Regular astigmatism means that the eyeball is on a different meridian with a different radius of curvature and a different afterimage. There are three clinical types of astigmatic axial position, namely, conformal astigmatism, retro-conformal astigmatism, and oblique axial astigmatism. Conformal astigmatism is clinically defined as astigmatism axially close to the horizontal orientation (150° to 210° or 30°-330°). Retro-axial astigmatism refers to an astigmatic axis at about 90° or 270°, and oblique-axial astigmatism refers to an astigmatic axis at about 45°, 135°, 225°, or 315°. Clinical statistics show that the number of patients with conformal astigmatism is high, and that low levels of conformal astigmatism generally do not have a significant impact on the patient’s vision. Inverse astigmatism and oblique axis astigmatism are extremely harmful to patients’ vision, but the incidence is not high and not very common, while about 50 degrees of inverse or oblique axis astigmatism will seriously affect the patient’s vision. It is recommended that patients with significant astigmatism should be seen promptly for evaluation of their condition and treatment as prescribed by their doctor.