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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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An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
Extinct North American Megafauna
Bereaved spouses studied before loss, at the time of loss, and 18 months after loss show five ...
During my research in India, I interviewed this 8-year-old girl. Mahashury is a bonded laborer who ...
Age-standardized disability-adjusted life year (DALY) rates from hepatitis B by country (per 100 000 ...
Loud Music and Hearing Loss (1 of 2)
Comparison of loss- and gain-of-function alleles