See if you can locate all the organs of the digestive system 1 What signs do we see here? 2 Here we see an assimilation ring and a hyperactive stomach. 3 You will see an overactive or hyperactive stomach as a distinctly whitish or lighter stomach zone than the remainder of the iris. The zone appears to be elevated. This means the hydrochloric acid level is above normal; heartburn is also a common symptom in this condition. Thus, the color of the zone reflects the tissue condition in the stomach. 4