If you want to measure astigmatism, you can do so by using astigmatometer, keratoconus and corneal topography, computerized optometry and other methods. 1. Astigmatism meter: Patients can look at the astigmatism meter and know the axis of astigmatism based on what they observe on the astigmatism meter, which is a subjective detection method. 2. Corneal curvature meter and corneal topography: Since most of the astigmatism originates from the cornea, the radius of corneal curvature, refractive power, and corneal meridian can be observed during the examination to know whether the patient has astigmatism or not, and the degree of astigmatism can be clarified. 3. Computerized optometry: Computerized optometry is one of the most direct testing methods, and the instrument is relatively accurate, which can not only determine whether the patient has astigmatism or not, but also clarify the degree of astigmatism and the axial direction. If you find blurred vision, vision loss and other symptoms, you should consult a doctor in time and follow the doctor’s instructions to do a systematic examination.