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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.
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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
SpaceShipOne completed the first manned private spaceflight in 2004, reaching an altitude of 100.124
Selected Minerals for Treating Nutritional and Electrolyte Disorders
Selected Minerals: Food Sources, Functions, and Deficiency and Toxicity Symptoms (continued)
The number of research articles published on the topic of religious practices and spirituality have ...
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