(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.
Green stool can be a trivial problem or it can be an indication of an underlying health condition. The color of human poop is an answer to the condition and functioning of the digestive system and other parts related to it i.e. liver, intestine and gall bladder.imilarly, green stools could be the result of any such condition. Generally, it is nothing to worry about passing green stools, as this could be because of excess intake of green leafy vegetables or food containing excess amount of artificial color.