(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.
Green stool â when your feces look green â is usually the result of something you ate, such as spinach. Certain medications or iron supplements can also cause green stool. Newborns pass a dark green stool called meconium, and breast-fed infants often produce yellow-green stools. In older children and adults, green stool is uncommon. It's rarely cause for concern. Causes.
1 Eating beetroot, tomatoes, cranberries or red food colourants might make your stool to look red. 2  Green leafy vegetables or green food colourants can colour your stools green. 3  Medicines such as anticoagulants (red or black stools), 4  Loose, watery stools in diarrhoea.