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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.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
Women are 50% to 75% more likely than men to experience an adverse drug reaction.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.