(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.
1 Medium brown is the color of healthy poop. 2  Pale, gray, clay-like stool suggests a liver problem. 3  Bile from the liver is what makes stools brown; not enough and you get ashy shades indicating anything from gallstones to hepatitis, pancreatitis to cirrhosis.