Color blindness is a condition that affects millions of people worldwide – it is estimated that one in ten men, and one in 100 women would have it. Usually color blindness is genetic, passed on the X chromosome from mother to son. The most common form is the inability to distinguish red from green, blue from yellow as well as identify patterns of colors. Although it is not life-threatening, color blind individuals are restricted from holding certain types of jobs, such as being a pilot, air traffic controller and police. Color blindness can be easily detected through eye tests using special colored charts called Ishihara Test Plates.