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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.
Green tea is able to stop the scent of garlic or onion from causing bad breath.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.