|
|
The horizontal fraction bar was introduced by the Arabs.
Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
Medication errors are more common among seriously ill patients than with those with minor conditions.