COLOR BLINDNESS / COLOUR BLINDNESS

 

The achievement of these tests is merely approximate, and it does not exclude, in any way, the review for an optician or ophtalmologist.

 

   
     

 

 

Do you see all the numbers?

                            - YES: very well.

                            - NOT: Also very well, but you are color-blind subject.

 

TALLERES RISOTERAPIA

 

More tests: 

        To realize these tests, simply, to observe the drawing with every eye separately during a few seconds, and to say that it is what is seen

 
  • "the normal" subject sees number 8
  • The color-blind subject sees number 3
  • The blind person to the color will not see anything

 

  • "the normal" subject sees number 2
  • The color-blind subject does not see anything

 

  • "the normal" subject sees number 5
  • The color-blind subject does not see anything

 

 

INFORMATION ABOUT THE COLOR BLINDNESS:

 

Eight per cent of the men endure a cellular alteration of the retina that prevents them from perceiving the colors adequately. This anomaly is named a color blindness and rarely it affects the women.

In the retina there are two types of cells, cones and canes, which make possible the vision. The first ones are the persons in charge of the perception of the colors.

Terrace Waggoner (in his house they know it ...), optometrist of Florida, the United States, makes clear that the shortcoming takes root in the cones. " These cells suffer a genetic alteration that prevents from perceiving the colors in the conventional form ", it indicates.

Men's thing:

Waggoner points out that the disorder in his classic form is inherited as a recessive feature tied to the X-chromosome. That's why, this suffering is practically exclusive of the masculine genre.

The men only have a X-chromosome, whereas the women have two. If a woman receives a X-chromosome with the feature of color blindness, it will be a bearer of the illness, but it will not present her because his another chromosome compensates the shortcoming.

"A man will always present the illness, since his defective X-chromosome cannot be compensated. In order that a woman has color blindness, his two X-chromosomes must be affected and, for it, he needs that his father is color-blind subject and his mother is carrying or daltónica. "

The rarest form of color blindness is the so called illness of monochromatic cones. Those who endure it see the world in tones of target and black. Nevertheless, the color blindness presents itself more frequently as shortcomings in the perception of the colors.

Types of color blindness:

-                     Two-colors: these persons have two types of cones instead of three. The suffering qualifies in protanopes, insensitive individuals to the red intense one, which there represents one of every hundred men, deuteranopes, they confuse the shades of red, green and yellow and it affects five of every hundred men, and the tritanopes, which are blind to the blue color and confuse the shades of green and blue, as well as those of orange and rose.

-                      Anomalous Three-colors: is the group more abundantly of color-blind subjects. They have three types of cones, but they perceive the tones of the shaken colors. It is usual for them to have shortcomings similar to the color-blind subjects dicromáticos, but less notable.

 

The color-blind subjects can suffer certain limitations according to the type of work that they want to recover.

For example, the color blindness is a motive of exclusion in the pilots' selection of aviation and also it can hinder the persons' work that changes of coloration need to perceive in the qualit control.

Unfortunately, the color blindness is a suffering that remedy does not have. Nevertheless, some patients can benefit from treatments with glasses that increase the contrast between the colors.

The so called glasses ColorMax were designed to increase the discrimination of colors that seem to be equal, they are functional for persons with shortcomings in distinguish the red and green colors, though, Waggoner adds, they do not produce effect in other types of shortcomings.

 

The color blindness was described for the first time by John DALTON,  who, as it seems, it was unable to distinguish the color of his toga.

John  Dalton (1766-1852):  English, born chemist in Eaglesfield (Cumberland). It occupies a place favoured in the history of the scientific thought.

It led to the concept of the atom of the qualitative area of the philosophy to the quantitative field of the science. It admitted that every chemical element was possessing his own species of atom with a weight typical and different from that of other elements.

It discovered the law of the thermal dilation of the gases (1801), law of the partial pressures of gas miscellanies (1801), it was the first one in announcing the atomic theory on an experimental base (1802-1803). In 1803 it announced another theory on the absorption of the gases for the water, where it incorporated the first list of atomic weight.

It introduced also a few systems of chemical symbols quite similar to those that the ancient chemists were using, it was showing the number of atoms of every element that was intervening in the formation of the molecule of the substance.

It turns out curious to think that in the war of Vietnam, the army of the United States used, successfully, color-blind subjects to distinguish from his planes the camouflaged camps of the Vietcong.

 

 

More information:

    A color-blind subject does not distinguish well the difference between any colors, especially the red one and the green, if the lighting is not good. His symptom is the difficulty to understand the difference between several colors without stemming from the mere confusion of the names. 

    The best form to detect it is using a test of colors, which is advisable to apply when serious problems are had to combine the colors. It does not cause serious alterations in the daily life, so in accordance with statistics, the color-blind subjects have neither major frequency of accidents of transit, major nor incidence in other ocular patologías, points out doctor García.

    They are problems without possible solution, though an early detection becomes necessary, to avoid in the possible so much the election of professions related deeply to the color, as to eliminate the possible risks that could stem from the problem.

    Anyhow it is necessary to clarify that the so called COLOR BLINDNESS is not in any way an illness. It is a question in a different way of perceiving simply the colors. It is necessary to add, also, that the color-blind subject distinguishes the colors, but it has problems to discriminate against them. Besides, the color-blind subjects develop a special skill to distinguish different intensities of light or of color.

 

the man machine

 

I am color-blind subject, I have already put it hereabouts one day. It is a handicap - it sounds well this word-. And it has good things and bad things, as everything.
Of coincidence, as always, I have found this article and have felt a bit identified. He has made me think.
I of small already had some problemilla in class when it was necessary to do tasks related to the colors. But I did not notice him greatly, simply he was thinking that it did not know well the names of the colors - because it him had paid attention ever - and that it was finding it hard to me to distinguish them a bit, topcoat when they were far like was the case of the slate of class.
It is a point this, I laugh. I remember one day, have the engraved image, which with a friend we were speaking that the brother of a partner was color-blind subject and that to distinguish the colors of the semaphores - and to cross or not - it was based on the position of the light. I would have approximately 13 years.
That thing about the color blindness is not anything rigid, every person has his particular idiosyncrasy (I think, for my experience), like those who have a chromatic "normal" vision: they not all see the exactly equal world as for colors refer. For example it is known that the women perceive better the colors than the men.
I have difficulties (topcoat when there is few light) to distinguish some colors, but I never imagined that it was color-blind subject. To that friend that I have mentioned - imagínate - I said to him: " ostia, that chungo not to be able to see the colors, with the nice thing that is the world... " AND I WAS color-blind subject JAJAJA.
That wound, I am the "best".
I yes distinguish - when there is sufficient light - the red one of the green, and to see if the semaphore is in green or in red I do not concentrate (at least consciously) on the position of the light. Though if that is true that when I am before some not standard semaphore if I have doubts on if the light is really green - that could happen - or is a light amber - to happen with precaution or I that I know-. There it is obvious.
I have spent to myself some test of color blindness and yes, confirmed, I am color-blind subject jeje.
But I see the very nice world. And fodder of that time, since there appears the author of the following article, " luck " that I do not know as they see the world the normal people - normal because it is what more abounds, not for another thing jeje. This is the baremo to consider something to be normal-.
If I saw the world as the normal people for a moment and then this way I might compare with my chromatic vision I do not know if I would throw myself of the hair, or I would give myself anger or ... I that I know. Thankfully it does not happen, at the moment.
He says that there have been proved a few glasses that leak the light and such, and that this way more colors are seen, but he says that THIS IS NOT HIS WORLD. And that he does not like, prefers not putting oneself on them nevermore and living in his everlasting world.
Go crack.
Ah, the good things that this has I suppose the fact is that, on having perceived fewer colors - probably because of it I concentrate less on some things-, I perceive more the essence. Or I like thinking it, concentrate less on the details and more in " everything ".

Greetings,

the man machine

PD what more I am the impacted one of the article has been this:
" Glasses exist with filters that help to correct the color blindness but I have never wanted to use them. Once I did the test and what I felt and saw I did not like. I realized that the world anyhow was not my world, felt it artificial, foreign. Such a different world, so distant that I preferred remaining with mine. Besides, at this point of my life I have neither time nor desire to learn other. "

 

 

" That so difficult is to be a color-blind painter"

For Juan Manuel Jaramillo

 

At the age of four I had the first indication of my color blindness. It was going with my father and another people mounting astride for a farm that we had in the Vale. My father asked me if I liked the burning carmine of his flowers, but I did not see anything red, only I saw green on green. In spite of being so small, of not understanding what wanted to appear, which was evident for all, I still had the desperation engraved.

I have done for ages. From small I have a special skill to do it and when I entered the Modern Gymnasium and registered in the classes of painting that were offering I stood out at once. My partners were approaching admired to seeing my pictures, but always they were noticing something: for what rogue the orange grassland?: porqué is the sky violet?. One of the teachers realized that possibly it was color-blind subject and said it to me. The word me sounded horribly, as and scared I went to an illness mortal to where my parents and I told them. They took me to the doctor, did to me the examinations of rigor and it was found that in effect it was suffering from color blindness. He was eight years old.


I continued doing, but not to be able to use the colors since the others it started distressing me. Thanks to Luis Caballero, who was of my class, I overcame the problem. He arranged me the palette, said to me: this are the blue ones, here the greens are and beyond yellow. From eses moment interpreted the world of other persons and somehow it took a double life in the painting. Let's say that in me there is a painter towards the exterior and another close friend. The first one is an acuarelista, a landscape painter with great reception that has taken part in more than forty exhibitions, which uses fat brushes and is not scared before big formats, risked, but that you all forms I work with the colors of others, under standards that the majority considers they are the normal ones. The second rogue with full freedom, rogue as he wants, since it sees actually the world and is reserved for if these pictures, one does not show them to anybody. This, the close friend, is the one that more I like.

The pictures that I decide to show to the public happen first for a committee of approval shaped by my wife and my children. In a beginning quite this process had something of awkward but nothing better than they to say to me truthfully if one of my works belongs to the normal cánones or if I have to leave her for my personal collection.

In a moment that painter's double condition with double life, became so tragic, but since quite in the life the time put of his part in order that it was overcoming it. Fortunately also I learned to handle without very much mystery the daily disadvantages that depart from my color blindness, which is moderated with of others (there is those who only see black and white). Still I remember the boy's holidays to which it was going with a tie or a suit that they were not combining for anything and of the whole world before my rash extravagance, since in fact it happened to John Dalton, man that the name gave him to my illness. The type, which had reputation of very balanced, presented himself one day opposite to the king dressed in a red brilliant tunic believing that it was dressed in a sober green.

For a good weather I learned not to feel rare for asking for help at the moment of having to buy a jacket, not to pay once for one color pistachio nut believing it was a camel and to come to the house illuminating it as if not at all.

Other one of the things that I learned is that whenever a new employee comes to my house I give him precise instructions: I request him comedidamente that he organizes in the clothier the averages or the sacks in strict order in order to avoid confusions.

It is a fact that the color-blind subjects we need more light than the others. When it falls down the evening, when it starts getting dark, the colors as such disappear for me, turn into gray tones, of misty greens. I believe that because of it Joseph M thrills me so much. Turner, the British painter who opened field to all the impresionists. This chromatic evanescence forces me to use a powerful lamp pinto when in the nights to be able to have a nearby idea of the colors. Equal, I believe that my way of painting water-colors also has departed from my condition. What pinto sound not debit sceneries of the detail but rather impressions, images of vales, raised areas or plateaus that have been fixed in my retina and that then I put on the role.

Glasses exist with filters that help to correct the color blindness but I have never wanted to use them. Once I did the test and what I felt and saw I did not like. I realized that the world anyhow was not my world, felt it artificial, foreign. Such a different world, so distant that I preferred remaining with mine. Besides, at this point of my life I have neither time nor desire to learn other.


(Taken of the Magazine SOHO)

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