Cataract Surgery Basics. In cataract surgery, the lens inside your eye that has become cloudy is removed and replaced with an artificial lens (called an intraocular lens, or IOL) to restore clear vision.The procedure typically is performed on an outpatient basis and does not require an overnight stay in a hospital or other care facility.hankfully, modern cataract surgery is one of the safest and most effective surgical procedures performed today. More than 3 million cataract surgeries are performed in the United States every year, with the vast majority of these procedures produce excellent visual outcomes.
Flatus: Gas in the intestinal tract or gas passed through the anus. Intestinal gas contains numerous gases including oxygen, nitrogen, hydrogen, carbon dioxide, hydrogen sulfide, ammonia, and methane. The foul smell usually is caused by small traces of gases such as hydrogen sulfide, ammonia, and methane.ntestinal gas contains numerous gases including oxygen, nitrogen, hydrogen, carbon dioxide, hydrogen sulfide, ammonia, and methane. The foul smell usually is caused by small traces of gases such as hydrogen sulfide, ammonia, and methane.
Here is how people define flatulence: 1  It is the emission of gas through the anus that can sometimes have a sound and mostly with a bad odor. 2  This is most commonly known as farting. 3  The gas released is called flatus. 4  The gas or flatus is mainly composed of nitrogen, methane, hydrogen, carbon dioxide and oxygen. Swallowing too much air is the common cause of excessive farting. 2  If you eat fast, smoke and chew too much gum, a big amount of air will go inside your body. 3  Overabundance of the bacteria that can be found on the colon-There are foods that cannot be easily absorbed.