Unfortunately many people learn of their condition at the worse possible time – during the job application process. Many industries require potential employees to take the Ishihara Color Blindness Test before a decision to hire is made.
These industries include law enforcement, engineering, railroad operation and aviation. Doctors today are still using the Ishihara Color Blindness Test that consists of 38 circles that are patterned with dots. In the center of each circle, the color of the dots are shaded various colors to display a hidden number. If the person being tested fails to find the numbers in the circles then he or she would be considered as someone with a form of colorblindness.