(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.
Poop Color 101. Poop is normally brown. The color is the result of what you eat and how much bile is in your stool. Bile is a fluid your liver makes to digest fats. It starts out as a yellowish green color. But as the pigments that give bile its color travel through your digestive system, they go through chemical changes and turn brown. Green Poop