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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.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
Thyroid conditions may make getting pregnant impossible.
Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.