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Author Question: Scientists studying cathode rays determined that the rays must be negatively charged because the ... (Read 58 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.
Medication errors are more common among seriously ill patients than with those with minor conditions.
People about to have surgery must tell their health care providers about all supplements they take.
Illicit drug use costs the United States approximately $181 billion every year.
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.