Under normal circumstances, the normal range of IOP value should be 8-21mmHg, so theoretically, IOP value over 21mmHg will affect the optic nerve, and the higher the IOP value and the longer it lasts, the greater the impact on the optic nerve. Therefore, if there is a high IOP, you need to go to the hospital early to improve the relevant examination, including visual acuity examination, IOP examination, fundus examination, optic nerve fiber layer analysis, biomicroscopic examination, etc., to clarify whether there is a manifestation of optic nerve damage. If it does exist, you need to actively lower the eye pressure for treatment to avoid greater impact on the optic nerve. If optic nerve atrophy is formed, it is usually impossible to return to normal. Therefore, it is important to pay attention to this condition, early detection and early treatment.