Glaucoma patients can’t see clearly because of the increased intraocular pressure, which presses on the optic nerve at the bottom of the eye, resulting in optic nerve atrophy and affecting the vision, thus making it difficult to see clearly. Glaucoma can be categorized into closed-angle glaucoma and open-angle glaucoma, which have different causes of increased intraocular pressure. 1. In closed-angle glaucoma, the adhesion between the peripheral iris and the trabecular meshwork narrows the anterior chamber angle gap, increases the pupillary resistance, and prevents the return of aqueous humor, thus increasing the intraocular pressure. 2. Open angle glaucoma may be due to degeneration or sclerosis of the trabecular meshwork and scleral venous sinus, resulting in poor circulation of aqueous humor and causing elevated intraocular pressure. Glaucoma patients who cannot see clearly may also be secondary or caused by trauma, but no matter which kind of increased intraocular pressure, see things clearly, should go to the hospital in time, and actively comply with the doctor’s instructions for treatment.