|
Author Question: All of the following may be factors in plaque formation except: a. chronic irritation to interior ... (Read 23 times) |
A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
In 1844, Charles Goodyear obtained the first patent for a rubber condom.