Did you know?
Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
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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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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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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.
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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
A typical handheld cylinder leakage tester.
A typical low-side driver (LSD) which uses a control module to control the ground side of the relay ...
A cutaway view of a typical two-stage turbine electric fuel pump.
Typical Reverse Osmosis Filter Setup
Typical pregnancy posture.
What’s the Secret of Math Success?