(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.
What Does Green Poop Mean? A lot of times people ask usâ¦ what does green poop mean? Well, green colored poop could be caused by a number of different things. The most common causes tend to be from things that have either been eaten or drank. Usually eating a large number of dark, leafy greens, such as spinach or collard greens, will cause a personâs feces, or poop, to change to a greenish color.