Glaucoma is a group of ocular disorders characterized by high intraocular pressure-associated neuropathies. It is usually administered topical ocular or through intraocular injection. Associated factors include inflammation, drugs, trauma and intraocular surgery, including cataract surgery and vitrectomy procedures. Measured values of intraocular pressure are influenced by corneal thickness and rigidity. Narrowing of the anterior chamber angle increases the risk of increased intraocular pressure. It dehydrates the vitreous humor and, therefore, lowers the intraocular pressure. Transpalpebral tonometry refers to methods of measuring intraocular pressure through the eyelid. A 2018 study found that intra-articular triamcinolone is associated with an increase in intraocular pressure. In most surgeries, an intraocular lens is inserted. This action facilitates the rate that aqueous humor leaves the eye to decrease intraocular pressure. Blood accumulation may also cause an elevation of the intraocular pressure. Moreover, chronic inflammation or intraocular surgery can lead to the same effect. Polymethylmethacrylate (PMMA) was the first material to be used successfully in intraocular lenses. Any kinds of intraocular surgery should be done by considering the intraocular pressure fluctuation. It was administered via intraocular injection.