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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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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.

Methicilli ...
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

The colors of peppers are determined by the interaction of several genes The colors of peppers are determined by the interaction of several genes
The tertiary of a transfer RNA as determined by X-Ray diffraction The tertiary of a transfer RNA as determined by X-Ray diffraction
Environment of tRNAs at the ribosome as determined by cross-linking Environment of tRNAs at the ribosome as determined by cross-linking
Blood Supply to the Lungs Blood Supply to the Lungs
"The Department of Agriculture came out today with its prediction for food price "The Department of Agriculture came out today with its prediction for food price
Chloroplast segregation determined by mating type in Chlamydomonas Chloroplast segregation determined by mating type in Chlamydomonas
Video: Ear Animation

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