1. Color blindness is more prevalent among males than females, because the most common form of color vision deficiency is encoded on the X sex chromosome.
2. 99% of all colorblind people are not really color blind but color deficient; the term color blindness is misleading.
3. There are three main types of color vision deficiency: protan, deutan, and tritan defects.
4. Strongly colorblind people might only be able to tell about 20 hues apart from each other, with normal color vision this number raises to more than 100 different hues.
5. Ishihara plates are the best known color blindness tests, but they are not the most accurate ones.
6. The terms protan, deutan, and tritan are Greek and translate to first, second, and third.
7. There are people which are really suffering from complete color blindness, which is called achromatopsia or monochromacy.
8. Protanopia, deuteranopia, and tritanopia are types of dichromacy, which means you have only two different color receptors (cones) compared to three with normal color vision
9. More women than men are carriers of color blindness, even though they are not colorblind themselves.
10. Red-green color blindness doesn't mean that you are only mixing up red and green colors, but the whole color spectrum can cause you problems.
11. The anomaloscope is the most accurate color blindness test known today.
12. Color blindness is also called Daltonism, after the scientist John Dalton.
13. Department of Molecular Genetics, University of London, UK. John Dalton described his own color blindness in 1794. In common with his brother, he confused scarlet with green and pink with blue. Dalton supposed that his vitreous humor was tinted blue, selectively absorbing longer wavelengths.
14. Not a lot of people, but some, suffer from a rare form of color blindness called unilateral dichromacy which means they have one normal seeing eye, and one color blind eye.
15. In the US, one in every 12 males may be affected by color blindness while for females, there is only less than one in 200.
16. Roughly around 8% of men's population are color blind.
17. Only about 0.5% of women's population are color blind.
18. If a father is red-green color blind, he cannot pass it on to his sons.
19. If a mother is red-green color blind, all her sons will also be color blind.
20. Contact lenses or glasses can help improve color blindness but they cannot give normal vision back.
21. in Romania and Turkey, it is considered illegal for color blind people to drive. It was because of the fear that drivers who are color blind will not be able to distinguish the difference in traffic lights.
22. A lot of famous and succesful people are color blind. Some of them include former US President Bill Clinton, the Duke of Cambridge Prince William, American writer Mark Twain, Hollywood director Christopher Nolan, scientist John Dalton, Facebook CEO Mark Zuckerberg, NBC host Matt Lauer, and celebrities such as Keanu Reeves, Eddie Redmayne, Meat Loaf, and Paul Newman.
23. The Facebook logo is blue because that is the dominant color that Mark Zuckerberg sees. Mark suffers from red-green color blindness.
I really hope you enjoyed this chapter. Do you know anyone who is colour blind???
Also what would you like facts about next??? Please let me know by commenting.
See you in the next chapter!
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