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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.
There are more sensory neurons in the tongue than in any other part of the body.
By definition, when a medication is administered intravenously, its bioavailability is 100%.
Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.