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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.

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The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

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Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

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All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Cushing syndrome. This syndrome includes the symptoms of obesity, moon face, hyperglycemia, and musc Cushing syndrome. This syndrome includes the symptoms of obesity, moon face, hyperglycemia, and musc
An example of a Hertzsprung–Russell diagram for a set of stars that includes the Sun An example of a Hertzsprung–Russell diagram for a set of stars that includes the Sun
New England children like David, Joanna, and Abigail Mason (painted by an unknown artist around 1670 New England children like David, Joanna, and Abigail Mason (painted by an unknown artist around 1670
Placing a Conference Call Placing a Conference Call
Typical Mendelian pattern of inheritance of HLA haplotypes includes children AC, BC, AD, and BD. ... Typical Mendelian pattern of inheritance of HLA haplotypes includes children AC, BC, AD, and BD. ...
Jostling. A form of coarse vibration that includes mobilizing joints. Jostling. A form of coarse vibration that includes mobilizing joints.
Video: hGH (protein synthesis, growth and development)

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