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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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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

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The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

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Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Hydrocephalus. The figure on the left is a child with the enlarged ventricles of hydrocephalus. The Hydrocephalus. The figure on the left is a child with the enlarged ventricles of hydrocephalus. The
Effects of septal defects: (A) normal shunt; no cyanosis; (B) increased pressure in right ventricle; ... Effects of septal defects: (A) normal shunt; no cyanosis; (B) increased pressure in right ventricle; ...
Effects of septal defects: (A) normal shunt; no cyanosis; (B) increased pressure in right ventricle; ... Effects of septal defects: (A) normal shunt; no cyanosis; (B) increased pressure in right ventricle; ...
Position of shunt to drain fluid in hydrocephalus. Position of shunt to drain fluid in hydrocephalus.
Soluble Regulators of Complement Soluble Regulators of Complement
Soluble Regulators of Complement Soluble Regulators of Complement
Video: Mendel's Principles of Dominance, Segregation and Independent Assortment

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