The function of the iris is to control light levels in the eye. The round, black dot in the center of the iris is called the pupil.Know More
The iris is the barrier between the front and back of the eye. Each iris has a muscle running through it that constricts and dilates to allow the right amount of light to enter the eye at any given time. The sphincter muscle lies around the edge of the pupil. In bright light, this muscle contracts, allowing only a small amount of light to get it. In dim light, the sphincter muscle dilates, letting in as much light as possible.
Each person's texture, color and pattern of the iris is unique and the color of the irises come from a pigment called melanin. Eye color comes from the amount of melanin a person produces in black/brown or red/yellow combinations.
Like other parts of the body, the iris may become diseased or infected. When the iris becomes inflamed, the result may be blurred vision and light sensitivity. Iridocyclitis is a condition in which the iris requires antibiotics to function normally. Congenital problems of the iris such as, iris coloboma and aniridia are rare and require seeking professional medical treatment.Learn more about Organs
The function of the uterus is to accept the fertilized ovum which will turn into a fetus and hold it during development; it also helps support the fetus during the gestation period. The uterus is the site where the fertilized egg is implanted for gestation.Full Answer >
According to the American Optometric Association, the eye works by light entering the eye and traveling through the different parts of the eye. Each part plays a vital role in creating a visual image.Full Answer >
According to the University of Michigan Kellogg Eye Center, the function of the iris in the eye is to control the amount of light that reaches the retina. It does this by changing the size of the pupil, the transparent window that allows light into the eye's interior.Full Answer >
The gallbladder's function is to store bile produced by the liver and release the bile into the small intestine during digestion in order to neutralize acids and break down fats. The fat in the digested food enters the small intestine, releasing cholecystokinin and triggering the gallbladder to release bile via the common bile duct.Full Answer >