In bright light, the pupil constricts to reduce the amount of light entering the eye. In dark or dim light, the pupil dilates to allow more light into the eye to improve vision. Normal pupil size tends to range between 2.0 and 5.0 millimeters, depending on the lighting. The younger you are, the larger your pupils tend to be.
Fecal incontinence is commonly caused by altered bowel habits (generally diarrhea, but also constipation) and conditions that affect the ability of the rectum and anus to hold stool. The sphincter muscles become weaker as you grow older.
Bowel incontinence (fecal incontinence) definition. Fecal incontinence can be defined as the unintentional loss of stool (feces) or gas (flatus). It is often due to a failure of one or more of the components that allow the body to control the evacuation of feces, when it is socially appropriate.