(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.
1 Changes in stool color may be due to diarrhea; bleeding in the intestine; diseases of the intestines, liver, or pancreas; and medications.  Green stool or poop is a common stool color change. It may be due to bile pigment in the stool because diarrhea moves food too quickly thorough the intestine so the chemical can't break down, or the green color may be due to certain foods like green, leafy vegetables or green food coloring.
It may be alarming to see green poop in your toilet bowl, but it isn't necessarily a cause for concern. The color of your stools is often a reflection of what you eat. Black stools, for example, can result from eating blueberries or taking medications that contain bismuth subsalicylate, such as Pepto-Bismol.ometimes, green poop is an indication of a health issue. For example, cancer patients who undergo a donor bone-marrow transplant may develop graft-versus-host disease, which is marked by a number of gastrointestinal symptoms, including watery, green diarrhea, according to the National Cancer Institute.