1, glaucoma is an ischemic disease for the following reasons: 1, the ciliary congestion and corneal edema in the symptoms of acute closed-angle glaucoma are the tissue reactions around the vascular obstruction of the anterior edge of the sclera, which is the end site of the cerebral vasculature; 2, the iris edema in closed-angle glaucoma is the reaction to the vascular obstruction of the iris, and the iris fan atrophy in the acute triad is the vascular ischemia of the iris segment, which is the end site of the cerebral vasculature; 3, the anterior chamber There are two possibilities for shallowing: – is the expansion of the lens, the other is the shortening of the anterior and posterior diameters of the eye wall, the latter is the reduction of the surface area of the eye wall, the shrinking of the eye is similar to cerebral atrophy; 4, atrial angle block is the tissue degeneration caused by chronic ischemia of the atrial angle, which is the end site of the cerebral vasculature; 5, the pathological enlargement of the optic papilla trap refers to the reduction of the area of the optic disc rim and the increase and deepening of the optic papilla trap, which is The volume of the optic nerve is reduced, and when accompanied by the corresponding visual field defect it is a defect of the retinal ganglion cell fibers, and the site of ischemia is anywhere on the visual conduction pathway from the intraocular retina to the lateral geniculate body of the brainstem in the skull, which is a brain white matter atrophy. Second, high intraocular pressure is caused by: shrinking of the eyeball, increased curvature of the eyeball and increased stiffness of the eyeball wall, and intraocular atrial fluid composition close to other leaky fluid in the body.