Patients without astigmatism, if wearing glasses with astigmatism, will cause harm to the eyes, the main harm is manifested in the following aspects: first, easy to cause visual fatigue symptoms, no astigmatism itself but wearing astigmatic glasses, will lead to distortion, distortion, so that the eyes show soreness and pain. Secondly, it is easy to cause glare phenomenon, after wearing astigmatism glasses, will make the external light in the eye inside the formation of scattering, so that see the edge of the scene appear burr, light source appears halo, known as the glare phenomenon, seriously reduce the visual quality of patients. Third, it is easy to lead to myopia growth, long-term wearing unsuitable astigmatism glasses, will lead to eye fatigue symptoms, prompting myopia increase, short-term wear will not have an impact.