June 12, 2013 @ DigitalJournal
Newcastle University neuroscientist Dr. Gabriele Jordan, recently announced that she has identified a woman who is a “tetrachromat,” that is, a woman with the ability to see much greater color depth than the ordinary person.
The first evidence that tetrachromats might exist came in 1948. A paper on color blindness written by the Dutch scientist HL de Vries, investigated color blind men who possess two normal cones and a mutant cone that is less sensitive to either green or red. This makes it difficult for such people to distinguish the two colors. De Vries incidentally tested the daughters of one of the color blind men and found that they could detect a wider range of hues of red than average persons. He found that while the color blind men had two normal cones and one mutant cone, the mothers and daughters of the color blind men had a mutant cone and three normal cones, that is, a total of four cones. He believed that the extra cone explained whey the women seemed able to distinguish a wider variety of hues of red. But De Vries did not have the opportunity to investigate the phenomenon further.