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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.
Did you know?
Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
The longest a person has survived after a heart transplant is 24 years.
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Thyroid conditions may make getting pregnant impossible.

