(June 2010) (Learn how and when to remove this template message) Base curve radius, or simply base curve, abbreviated BCR or BC, is the measure of one important parameter of a lens in optometry. On a spectacle lens, it is the flatter curvature of the front surface.
Green stool â when your feces look green â is usually the result of something you ate, such as spinach. Certain medications or iron supplements can also cause green stool. Newborns pass a dark green stool called meconium, and breast-fed infants often produce yellow-green stools. In older children and adults, green stool is uncommon. It's rarely cause for concern. Causes.
Green or yellow stool is usually caused by your bowels moving too fast, as with mild diarrhea. Bile, the main pigment in poop, starts out green and turns brown over time. Pale gray or yellow feces may indicate liver disease. 2. Look for signs of blood. Take note of any stool that is red or pitch black in color. Bright red indicates bleeding late in the digestive tract, likely the large intestine or anus. This type of bleeding typically indicates non-serious health issues, such as minor inflammation or hemorrhoids. It can also rarely be a sign of cancer.