Metabolism is the process by which your body converts what you eat and drink into energy. During this complex biochemical process, calories in food and beverages are combined with oxygen to release the energy your body needs to function.
Closed-angle glaucoma is more common in women. Glaucoma has been called the silent thief of sight because the loss of vision usually occurs slowly over a long period of time. Worldwide, glaucoma is the second-leading cause of blindness after cataracts.
Topic Overview. All forms of glaucoma cause the same characteristic changes in the optic nerve, at the back of the eye, and the nerve fibers. Glaucoma causes changes in the appearance of the optic disc (notching or thinning of the edge) and changes in the nerve fiber layer (fiber defects). Moderate glaucoma refers to optic nerve damage with moderate loss of vision in at least one eye. 2  But sight in the center of the eye (central vision) is not affected. 3  Severe glaucoma refers to optic nerve damage with loss of vision in both eyes or loss of sight in one eye that includes central vision loss.