Intraocular pressure of 28mmHg can not be identified as glaucoma, because glaucoma is a group of diseases characterized by characteristic optic nerve changes and visual field defects as a common feature, usually pathologically high intraocular pressure is the main risk factor. Measurement of intraocular pressure will have error, measured 28mmHg of intraocular pressure may be the patient is more nervous, do not cooperate, only a measurement of intraocular pressure can not be counted, as follows: 1, the requirements of the patient’s cooperation in the case of at least 3 times the intraocular pressure is high to be considered as the really high intraocular pressure; 2, the intraocular pressure is also related to the thickness of the cornea, some people’s cornea is thicker than normal, the normal intraocular pressure value is higher than the so-called 21mmHg, so if the cornea is very thick, 28mmHg is normal, so if the cornea is very thick, 28mmHg is normal. If the cornea is thick, 28mmHg is the normal value; normal intraocular pressure 10-21mmHg, just a statistical concept; some people’s intraocular pressure is higher than the value, not glaucoma, and some people’s intraocular pressure is lower than the value, glaucoma. Therefore, the 28mmHg IOP alone cannot determine glaucoma, and it is necessary to go to the hospital to check the fundus optic nerve condition, visual field condition, in addition to regular follow-up, in order to detect early glaucoma, and carry out timely treatment.