There are approximately 200 million individuals worldwide who suffer from some kind of color vision deficiency (CVD). Red/color blindness is a common hereditary condition which is usually inherited from parents. It is passed from mother to son on the 23rd chromosome, the sex chromosome, and thus the frequency of red-green CVD is significantly higher for male population. Unlike red/green CVD, blue color blindness is extremely rare (only about 0.003% of the population is affected by it); tritanomaly that causes color defect in blue is not carried on genetically