Glaucoma associated with ocular trauma is an eye disease caused by multiple factors. For example, eye contusion, laceration, chemical damage, electromagnetic radiation damage, or surgical injury can all cause glaucoma. Increased intraocular pressure may occur within a few days after the injury, or may occur several years later. The chamber angle may be open or closed. The injured eye may show obvious signs of injury or may be very disproportionate to the clinical signs. In fact, eyes prone to glaucoma often have low intraocular pressure rather than high intraocular pressure in the early stages after ocular trauma, because ciliary body contusion and inflammation, ciliary muscle tear and separation can increase uveoscleral drainage; tears from the trabecular meshwork to the Schlemm canal, or deformation of the eyeball caused by penetrating injuries to the sclera or cornea can all lead to reduced ciliary secretion of aqueous humor.