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Hantavirus Infection
Hantavirus infection is a viral disease that is spread from rodents to people. The virus can cause severe infections of the lungs (with cough and shortness of breath) or kidneys (with abdominal...
What Every Patient Needs to Know About Sinusitis and Sinus Infections
After several days of suffering from a cold, all you want is to feel better and get back to normal. But that doesn’t always happen. Sometimes, your congestion and runny nose are joined by fatigue...
Listeria, Listeriosis, and Food Recalls
Mushrooms, soft cheeses, frozen waffles, precooked chicken, deli meats …Over the past several months, there have been many headline-grabbing recalls of foods sold around the country. Many of...
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Test Your Knowledge
View AllCataract
Which one of the following descriptions of adverse eye conditions best describes cataract?
- A condition in which light rays entering the eye are not focused on the retina, causing blurred vision.
- Progressive optic nerve damage that leads to progressive loss of vision usually occurs because of increased pressure in the eye.
- A clouding (opacity) of the lens of the eye that causes a progressive, painless loss of vision
- A condition that causes progressive damage to the macula, the central and most vital area of the retina, resulting in gradual loss of central vision.
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Important: The authors, reviewers, and editors of this material have made extensive efforts to ensure that treatments, drugs, and discussions about medical practice are accurate and conform to the standards accepted at the time of publication. However, constant changes in information resulting from continuing research and clinical experience, reasonable differences in opinions among authorities, unique aspects of individual clinical situations, and the possibility of human error in preparing such an extensive text mean that other sources of medical information may differ from the information on this site. The information on this site is not intended to be professional advice and is not intended to replace personal consultation with a qualified physician, pharmacist, or other health care professional. The reader should not disregard medical advice or delay seeking it because of something found on this site.
