The iris is a circular, pigmented membrane that provides the eye its color and the opening in the center is the pupil of the eye.
The iris is made up of muscular fibers that control the amount of light entering the pupil so that you can see clearly. The iris accomplishes this task by making the pupil smaller in bright light and larger in dim light.
While painful and unsightly, most styes heal within a few days on their own or with simple treatment. Chalazia, too, often disappear on their own, but it might take a month or more.
Typical treatment for a sty consists of applying very warm compresses to the affected eye for 10 to 15 minutes twice to four times daily for several days. This not only relieves pain and inflammation, but also helps the stye resolve faster. Be sure to close your eye while using the compresses. When the stye comes to...