Colorblindness | 10 Curiosities you may not know

Surely throughout your life you have heard about color blindness and you may even know someone who suffers from it.Color blindness «is an alteration of genetic origin that affects the ability to distinguish colors».how it can affect the person is very variable and goes from the impossibility of distinguishing any color to a slight difficulty to distinguish shades of green or red .Although socially it is not considered an important alteration, if it is for the one that is affected since in many occasions it supposes a problem in the daily life. Join us to know more about the Colorblindness with these 10 Curiosities that perhaps you do not know .

The name of Daltonism comes from the English naturalist, meteorologist, chemist and mathematician John Dalton who was the first to identify it.In 1794 he presented a work entitled "Extraordinary facts related to the vision of colors" .the cause, He made a great description of this visual deficiency that he himself suffered.

10 Curiosities of color blindness that you might not know

John Dalton

1. Color blindness is an eminently masculine alteration .It affects 8% of men and only 0.5% of women.That is because it is hereditary, but it is transmitted through a recessive allele linked to the X chromosome.If you want to know more about its transmission, you can find it at the entrance to Science Daily Online Datonism and hemophilia | Do you know what they have in common? If a woman is colorblind and not just a transmitter, all her children will be.

2. Color blindness is a dyschromatopsia , that is, a difficulty in perceiving colors.There are dyschromatopsies that They are not genetic and are due to diseases of the optic nerve or the retina.

3.The photoreceptors we have in the retina are divided into cones and rods.The rods perceive the contrast and the cones the colors.The latter are divided into three types, one sensitive to red light, another to green and the last to blue.icos do not distinguish some colors due to a modification in the genes that are responsible for producing the pigments of the cones.

4.There are different types of color blindness according to the effect of perception of color and light; however, 99% of color blinds have deuteranopia , which is the absence of photoreceptors in the retina of the green color and protanopia in which they lack red retinal photoreceptors.According to their severity, they are divided into mild, moderate, strong and absolute.

Colorblindness | 10 Curiosities you may not know

5.There is a color blindness called « achromatic » in which the person sees only black and white and a gray scale There is only one case per 100,000 individuals.

6.In Turkey and Romania, among other countries, color blinds are not allowed to drive vehicles for fear they cannot distinguish traffic signs well.

7.In many places, cannot access some jobs either as a policeman, firefighter or pilot.However, during World War II, color blindness It was considered an advantage and soldiers with this alteration were recruited for their ease of seeing in certain camouflages, since they captured colors that people with normal color vision could not distinguish.

8.Other curiosities of the color blindness that you might not know is that there is a particularly rare and unusual condition called "unilateral dichromiacy" .Cu I suffer, one eye is colorblind and the other is not.

9. The Letters of Ishihara. To detect color blindness, the most used procedure is Ishihara's letters.They were devised by Dr.Shinobu Ishihara, a professor at the University of Tokyo.He published his results in 1917.They are a series of 38 sheets in which there are to identify a number.There are, however, other methods such as the Farnsworth Test or the anomaloscope.

Colorblindness | 10 Curiosities you may not know

10. Famous with color blindness .As the last of these curiosities about Colorblindness, we will cite some famous people who, like Dalton himself, the writer Mark Twain or Prince William , Duke of Cambridge, suffered or suffer this alteration.I am sure that some names surprise you.Among the best known actors, are Paul Newman, Keanu Reeves or the recently deceased Rutger Hauer .Among the politicians, Bill Clinton and among the athletes stand out golfer Jack Nicklaus or former Rugby player Mike Blair. Mark Zuckerberg is also affected because of the red-green color blindness and that is said to be the reason why the Facebook logo is blue.

Color blindness represents a handicap in daily life for those who suffer, but fortunately society is increasingly aware of it.For that reason, caution is chosen when choosing r the colors of emergency warnings or safety exits so that they can be seen perfectly by that group.They are also acting on more playful issues such as sport, preventing the teams that must face from seeing colors or stripes that do not can be easily differentiated by a color blind. Do you know these curiosities about color blindness? Do you know any more? Share it with us! We will be happy to read you.

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