|
|
A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.
Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
There are 20 feet of blood vessels in each square inch of human skin.
![A typical calibration code sticker on the case of a controller. The information on the sticker is ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_2_31_24_2938944.png)
![A typical two-step ECT circuit showing that when the coolant temperature is low, the PCM applies a ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_8_38_08_299001875.png)