The structure of the eye in glaucoma has the following parts: Sclera: This is the fibrous outer shell of the eye and is part of the white sclera visible at the front of the eye. Cornea: In front of the iris, it is the clear part in front of the outer shell from which light enters the eye. Iris: is the colored part of the eye, which contracts and dilates to determine the size of the pupil so that just the right amount of light enters the eye. Pupil: is an opening, like the shutter of a camera, that allows light to enter the inside of the eye. Lens: The light passes through the lens and collects on the retina of the eye. Retina: The optic nerve fibers in the retina transmit the light and image information received to the brain via the optic nerve. Ciliary body: The ciliary body around the lens constantly produces atrial fluid. Atrial aqueous: Atrial aqueous constantly passes through the pupil, over the surface of the iris, and out of the eye through a drainage tube located around the outside of the iris. The structures associated with glaucoma are concentrated in the anterior part of the eye and include the atrial horn and the pupil. The atrial angle structures include mainly the posterior elastic lamina stop Schwalbe’s line, the trabecular meshwork, the scleral eminence, the ciliary body band, and the iris root, with the trabecular meshwork playing an important role in the pathogenesis of glaucoma. Generally speaking, closed-angle glaucoma is caused by narrowing of the atrial angle for various reasons, which prevents atrial fluid from draining through the trabecular meshwork and leads to increased intraocular pressure. Another structure associated with glaucoma is the pupil, which plays an important role in the pathogenesis of closed-angle glaucoma, especially in acute closed-angle glaucoma, where increased pupillary blockage due to a variety of causes prevents atrial aqueous from entering the anterior chamber, leading to increased intraocular pressure and glaucoma attacks.