(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 is not uncommon and may be the result of too much or too little bile or food moving through the intestines too fast. Diet can also effect stool color. Green vegetables, such as spinach and broccoli can cause green stool, and foods containing green food coloring can yield the same result. Just as often though, other food colors can have the same impact. Purple drinks are a particular culprit, especially in young children. Some dietary supplements, especially iron, can also cause green stool.