A cataract is a clouding of the lens in the eye that affects vision. Most cataracts are related to aging. Cataracts are very common in older people. By age 80, more than half of all Americans either have a cataract or have had cataract surgery. cataract is a clouding of the lens in the eye that affects vision. Most cataracts are related to aging. Cataracts are very common in older people. By age 80, more than half of all Americans either have a cataract or have had cataract surgery.
Commonly known as farting, passing wind, or having gas, flatulence is a medical term for releasing gas from the digestive system through the anus. It occurs when gas collects inside the digestive system, and is a normal process.
Facts about flatulence (gas), excessive, and chronic. 1  The definition of flatulence or intestinal gas is the state of having excessive stomach and/or intestinal gas (waste gas produced during digestion) that is usually released from the anus with sound and/or odor. Causes of excess gas in the digestive tract are swallowed air, breakdown of undigested foods, lactase intolerance, and.