Diagnosis If you have trouble seeing certain colors, an eye care professional can test for a color deficiency. Testing likely involves a thorough eye exam and looking at specially designed pictures. These pictures are made of colored dots that have numbers or shapes in a different color hidden in them.

Understanding the Context

Stool gets its typical brownish color from bile, which flows into the small intestine during the digestive process. If the liver doesn't produce bile or if bile gets stuck in the liver, stool will be light colored or white. Often the problem occurs in the tube that delivers the bile to the small intestine. This tube is the bile duct.

Key Insights