The vitreous humor, crystalline lens, and aqueous humor are all important components in maintaining intraocular pressure, with aqueous humor being the most important. Intraocular pressure (IOP) is the pressure of the contents of the eye on the wall of the eye, and is measured clinically as a function of intraocular pressure and the hardness and shape of the wall of the eye. The contents of the eye consist mainly of the aqueous humor, the lens, and the vitreous humor, which also consists mostly of water, and under normal circumstances, the aqueous humor is an important component in maintaining intraocular pressure. Normal intraocular pressure is 10-21 mmHg, greater than 10 mmHg is called low intraocular pressure, and greater than 21 mmHg is high intraocular pressure. Atrial fluid is secreted by the ciliary body and can flow out through the Hirschsprung’s canal in the anterior chamber. When a patient has glaucoma, the outflow channel is blocked, which causes the patient’s intraocular pressure to rise. It is recommended that patients with abnormal intraocular pressure seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.