The Ishihara test is one of the famous tests to check color deficiency syndrome.  This is mainly used for people who are officers, pilots because they need perfection in distinguishing colors. The suggestion is to not cheat in these kinds of tests due to which the real requirement could not be found. During a doctor's examination, a patient should exhibit what he exactly can see. This will help the doctor to find the area of the problem. Other than this, one can challenge the effectiveness of this test by saying that the lantern color blindness method is more realistic than it.