Question 1: What are your feelings on the recent discovery regarding monkeys and a possible cure for their colorblindness? Do you think that it is legitimate, and do you think it should be used on humans in the future?

I think we have to look at this in a broader view. Personally I don’t believe that one of the big problems of our society is to cure color blindness. But scientific work in this area—genetic eye treatments—may help us to understand much better how we can help other people and heal some severe diseases.

And if there is a breakthrough why shouldn’t we use it on humans? Every person should be free to decide if he or she wants such a treatment or not.

Question 2: Do people affected by monochromatism look at life differently? Do they have less emotions because they live in a black and white world?

Yes, definitely. If you are suffering from monochromatism you are not only living in a gray world but also are severely sensitive to light, long sighted and more. This for sure makes your life look different.

Besides that if we only look at the world in gray colors I also think, that this changes a lot. You will see other things as all the colors don’t disturb your perception. Of course you will also not see certain things as the brightness difference might be to small for your eyes. There are certain things which you would struggle with but overall I would say if you are suffering from monochromacy you don’t look at life differently, but just at the world if you have to fulfill and live in a surrounding created by people with color vision.

And I don’t see any relation between emotions and colors because even little babies show a lot of emotions before they really can see colors at all.

Question 3: Should public schools be required to incorporate information about colorblindness in their science curriculum?

No I don’t think so. There are so many interesting scientific things which we can learn at school and color blindness doesn’t need a special treatment in this curriculum.

What I think should be done is to teach the teachers on the topic of color vision deficiency. Every teacher should at least once hear about it and maybe know some techniques to help colorblind students. I strongly believe that every colorblind pupil will find its way through school perfectly and teachers could support this if they sometimes only would know a little more about it.

Question 4: Are there any alternative attempts to cure colorblindness that you are aware of? If so, how affective are they?

There are people who claim, that corrective colored lenses or glasses can cure your color blindness or also some Chinese medicine techniques claim to help. Personally I don’t believe that there are some other possibilities to cure a color vision deficiency.

In 99% of all cases color blindness is encoded in your chromosomes. Therefore you can’t just adjust something easily or push some hidden trigger to cure it.

Question 5: What social disruptions can colorblindness bring upon a person’s life? Teenagers lives in particular. I am colorblind and my mom and sister are both artists. I can not take art class, interior design, yearbook, or any classes like that because of my condition. Can you think of anymore?

Just recently I received an email from a 15 year old boy who is getting teased by his classmates because of his color blindness. So this really can be a problem but I suppose this doesn’t happen to often and is only a problem at a certain age.

Of course, there are certain jobs you can’t accomplish as a colorblind person. Jobs which relate on color vision as their primary task like the ones you mention, or jobs which need good color vision usually for safety reasons. This often causes a lot of frustration among people who realize that they can’t start a career of their dreams, which I fully understand.

But many other people also can’t make their dreams come true. We have two possibilities to follow in this case. Either we work towards better regulations, better aids and tools, and better education in the topic of color vision deficiency. Or we have to accept that not every dream will become true in our lifes.

Sarah put together some really interesting questions concerning the perception of color and how I handle this as a quite strongly colorblind man. Here are my answers to her questionnaire:

Sarah: I’m interested in the perception of color to one’s self, mostly. How do you describe colors to yourself (when others are not around)? For instance, what does ‘colorful’ mean to you? Do you conjure up an image of rich blues, yellows, and whites, or do you include red and green (what you perceive to be red and green, anyway) in that definition?

Colblindor: I included this picture as an example for what colorful means to me. If it includes red or green, I can’t tell you. So I can not tell you which colors I explicitly include to name something colorful as I can’t name them. I would say a colorful thing needs at least three to four clearly distinguishable colors for me. This could also be a fire truck red and a grass green combined with some blue or yellow. On the other side I can tell you that there are certain pictures which are not colorful for my eyes but seem to be colorful if you are not colorblind yourself.

Sarah: In your own mind (just yourself, all alone), do you describe the world around you in shades of blue and yellow, or do you throw red and green into the mix? For example, if you saw a brightly lit Christmas tree, would you say to yourself that you see a lot of blue and yellow lights, or would you describe colors you think might be red, green, purple, etc.?

Colblindor: If you dig a little deeper into the topic of color blindness you can learn, that moderate to strong color-blind people have problems along the whole color spectrum (see Colorblind Colors of Confusion). I am strongly red-blind and therefore have also problems for example with blue/violet/purple or blue-green/gray/purple. — Personally I would say I don’t attach color names to my visual perception. I only name them when somebody else asks about it and this very often puts me into a position, where I just can’t name it or even describe it properly.

Sarah: Do you describe things to yourself as being red/green/etc. when the situation does not call for a need to tell the exact color? For example, grass is green and everyone is taught this at a young age, but when you’re just walking around by yourself, do you ever mistake grass for being yellow/another color (before remembering it’s green)?

Colblindor: As I described above I don’t really actively perceive colors attributing names to them, only if I learned the color of something (green grass). In this case I just know the color name but don’t clearly perceive it. Therefore I can’t really say that I sometimes mistake anything for having a wrong color. Sometimes I get confused if I know something always has a certain color (for example red) and I perceive it completely differently. In this case I ask myself if this is really the color it should be or if the source of the problem is somewhere else.

Sarah: I can use certain color filters that show me what some images might look like to someone with a color vision deficiency. To my color normal eyes, these filters for red-green deficiency make a rainbow look like a streak of yellow in the sky. Is that how you would describe it too? If not, how do you perceive it?

Colblindor: Rainbows look like rainbows. Rainbows are not to colorful for my eyes but anyway a beautiful phenomenon. In colors I would say blue-something-yellow-some other color streak. By the way, the picture wall on this image looks very colorful to me, even if I can’t tell you at all which colors I see.

Sarah wants to learn a lot more about color blindness. She says: “I’d love to talk to anyone with any form of color vision deficiency”. So if you feel like chatting just contact her directly at sarahvas84@gmail.com.

Rainbow photo by Cavin

I would like to show you four types of color blindness which are true for almost all of us. Starting with a very simple form we will definitely get into more details when it comes to small-field tritanopia, which strongly supports my statement that everybody is colorblind.

(A) Colorblind in the Darkness

When it is getting dark at dusk colors start to fade. You start to mix up colors and are not so sure any more when it comes to naming a specific color. So one could say that everybody is colorblind in the darkness.

I know this is not such a strong argument to support my statement, but it is a very good example to get an impression of how it feels like if you would have some form of color vision deficiency.

(B) Ultraviolet and Infrared Blind

Non of us can see both far ends of our color spectrum: infrared and ultraviolet. We name those colors but we can’t see them. This doesn’t necessarily means we are colorblind if nobody can see them anyway. But there are creatures who can see those colors.

A lot of people heard that bees can see ultraviolet light; which is true. But they don’t have a broader color spectrum as they also have only three different color receptors like people with normal color vision. Bees see less reds and more blues, that’s not really better than us isn’t it.

But there are some fish, some turtles and the whole family of birds who can perceive our whole color spectrum and also ultraviolet light. Birds have four different color receptors (tetrachromats) and clearly can see more colors than you and me. On the other side we have for example rattlesnakes which have some form of infrared eyes which can see the prey at night.

(C) Tetrachromacy

If you believe it or not but not only animals are tetrachomats but also humans can have four different color receptors!

Studies have shown that women who carry the color vision defective gene, can develop four different receptors in the eye and therefore have a broader color spectrum than the rest of us. This is a very rarely diagnosed phenomenon but definitely makes all of us colorblind compared to tetrachomatic women.

(D) Small-Field Tritanopia

And if you think the three points above don’t really prove that we are all colorblind this last point will definitely change your mind.

Normal color vision means you have three different color receptors: one peeking at red (L-cones), one at green (M-cones) and one at blue (S-cones). Together we have about 4.5 million of those receptors distributed all over our retina. Most of them are L- and M-cones and only about 7% are blue sensitive.

A closer look at the distribution of the color receptors shows, that in the very center of the retina, inside the fovea, there are no blue cones at all! As this spot is very small—you can think of visual field the size of a tennis ball at the other side of the court—this is called small-field tritanopia. See also my article about tritanopia to learn more about this type of color vision deficiency.

So in the center of our visual field we have no S-cones. This means only L- and M-cones can give us information about the colors in that spot and therefore we are all dichromats in the fovea. — And why do you don’t know anything about your central color blindness? Because your eyes don’t really focus on such a little point but often move around. This makes you believe, that you have trichromatic color vision over your whole visual field.

And because small-field tritanopia is true for all of us, everybody is at least a little bit colorblind! quod erat demonstrandum.

What I am looking for are the colors we colorblind people have problems to see or distinguish.

This first list of colors which are confused by color deficient people is taken from the book Diagnosis of Defective Colour Vision by Jennifer Birch. It is important to know, that these colors are only mixed if there exists no luminance contrast.

From my perspective as a strongly red-blind (protanopia) guy I would say the above list is a quite good image of my color perception. They do also fit with the colors along the so called confusion lines of the corresponding type of color blindness.

I would like to add my personal list of color blind colors which I often can not distinguish. And I also would like to add some examples to them, so somebody with normal vision might be able to imagine a little bit how it feels to be colorblind.

Protan Confusion Colors

dark red/black: If I get an email with words highlighted in red, I can’t see them.
grass green/orange: I couldn’t spot an orange laying in my lawn.
leaf green/red: No red blossoms in trees and no red apples in trees.
bright green/yellow: I can’t see if a banana is ripe or not.
indian summer colors: It’s colorful, but I have no chance to name the colors.
dark blue/violet: I’ll never know what the difference is.
cyan/gray: All shades of blue-green look truly colorless to me.
brown/green/red: Please, don’t talk about red animals in the forest.

I suppose there are many more shades and colors I can’t really see. But this is a list of colors which I often come across and have big problems to identify and classify.

So what are your colors of confusion, problem colors, color blind colors? It would be very interesting to hear also from you which colors cause you the biggest problems.

Named Non Colored Crayons

A french student from a packaging design class had just this idea. All white crayons named with the corresponding color.

Her professor says: “After all isn’t color subjective? Think of the colorblind people for example. So here’s the objective set of color pencils.”

Ok. I am colorblind and think about it. And I think it’s of no use for us colorblind. Why?

As a colorblind person I have great difficulties in seeing, differentiating and specially naming colors. So if I see a certain color I can’t tell you if it is red or green, because I can not see it.

Now, let’s imagine I grab a colored pencil which is just plain white only with its color name printed on it. I actually don’t really know how this color looks like as I don’t know which name corresponds to the color I see. Ok, if I know the color of a certain thing it could help (I learned that leaves are green—most of the time). But otherwise the name is not a clue for me at all.

What I need is to see the color so I can compare it if it really is the one I need. And even if I see it, there is still a big chance that I still will mess them up. So names are for nothing and colors are unfortunately not much better.