Question From T.L. I am a 32 yr old women,and I was tested for color blindness when I was 5 yrs old.I have been told many times,that this is something only men have.It gets pretty frustraiting. I am color blind,and it is something I have learned to live with.But,it is not something anyone would say they were if they were not.It can be hard to shop,I have to take my daughter with me to help match things up.I would like it if you could send me any information you have on color blindness in women.
Answer: Thank you for your inquiry. The following is from my webpage – click here Explains Colorblindness and Why You Are Colorblind .
5% to 8% (depending on the study you quote) of the men and 0.5% of the women of the world are born colorblind. That’s as high as one out of twelve men and one out of two hundred women.
The commonest forms of congenital defective color vision, the red-green deficiencies, are due to “sex-linked X chromosomes” and “simple recessive hereditary traits”. Men are mainly affected because women have two X chromosomes and men have only one X and a Y chromosome. If a man’s one X chromosome is color defective, he will be color deficient, where as , a woman must inherit two color defective X chromosomes to be color deficient. For a woman to be color deficient, her father must be colorblind and her mother colorblind or be a carrier.