Red and green color blindness are sex chromosome recessive disorders, which are more common color vision abnormalities in ophthalmology, due to genetic causes of color vision dysfunction. Red-green colorblindness is associated with the sex chromosomes of the parents, which carry the recessive gene for colorblindness. If the father is colorblind and the mother is not colorblind, there is a certain probability of having a child who is not colorblind, and if the mother is a carrier of the recessive gene for colorblindness and the father is not colorblind, the probability of having a child who is colorblind is 1/4. The probability of having a child with color blindness is calculated by cross matching the genes according to the law of inheritance.