(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.
Because bacteria influence the normal color of poop, a change in bacteria may mean a change in stool color, often to green. Certain medical procedures - for instance, if a bone marrow transplant is rejected, it can cause graft versus host disease. One of the consequences of this condition is diarrhea and green stool. Parasites and bacteria - certain pathogens can cause poop to turn green, including the Salmonella bacterium, Giardia (a water-based parasite), and norovirus.