Talk:Color blindness

Famous colour blind artist

Clinical and Experimental Optometry has an article showing that Clifton Pugh on biographical, inheritance and other grounds was was a protanope. I have looked hard but cannot see any place suitable for this information in the article. There is no section for "notable color blind people" though such sections exist for example for Prosopagnosia. I have put this information with reference (more details are in the online abstract) in Color blindness and occupations though this is not the ideal place. However the information is important since it shows that color blindness should not stop people for seeking to become artists if that is their talent.

Rename article to "Color vision deficiency"

The article should really be renamed to "Color vision deficiency" and "Color blindness" redirect to it. As stated in the article it is more common to be deficient in color vision, but not lacking it! Therefore color blindness (not perceiving colors at all) is a special/maximum case of color vision deficiency. Using color blind for describing a condition with a broad range is a very unprecise top-level term, derogatory, and perpetuates ignorance.

Thanks for considering the renaming.

Rainbow diagrams

Could these diagrams be removed? They aren't at all correct. — Preceding unsigned comment added by 80.189.80.23 (talk) 18:51, 31 May 2013 (UTC)

What is wrong with them, and what should be the correct diagram?--Vbakke (talk) 11:16, 31 July 2013 (UTC)

A root of the problem is commons:File:Gay flag.svg, modified back and forth for several years, to be chosen as the base of all these *anopia images. Later I tried to start a discussion, but it was dumped to an archive and forgotten. When I tried to fix some previous mistakes I likely introduced my own ones, but was reluctant to fix further due to insufficient feedback. Of course, if one can repair all this disorder, it would be great. Incnis Mrsi (talk) 11:36, 31 July 2013 (UTC)

I don't know enough to determine whether the flags are right or wrong. A simple step would be to delete the images because they are WP:OR or WP:SYN. We don't have a source telling us what the images should look like. We do have sources telling us how the 1895 flags and Ishihara plates are perceived. If there is a source for transforming color coordinates for different symptoms, then there could be a WP:CALC argument, but I don't think that is made in the current article. Glrx (talk) 22:13, 31 July 2013 (UTC)

I agree. If we keep them, we need to tie them to the specifications that created them. A bit of original work is OK in creating illustrations, but only if the underlying data are reliably sourced, I think. Dicklyon (talk) 23:33, 31 July 2013 (UTC)

Colourblindness in WWII

During WWII people with colourblindness were used on occasion to detect camoflage - there are a number of webpages on the subject (but for technical reasons I cannot call them up at the moment). Jackiespeel (talk) 14:33, 4 July 2013 (UTC)

You likely speak about deuteranomaly – technically it is not a color blindness, and it is rather common condition. Can you make an article about it? Incnis Mrsi (talk) 11:36, 31 July 2013 (UTC)

Not so much to "detect" camouflage, but to look at black and white photos of camouflaged items, in which they could see much more detail than non-colourblind people. Old_Wombat (talk) 12:25, 4 September 2013 (UTC)

Could see much more detail at black and white photos? It is an utterly ignorant speculation. Incnis Mrsi (talk) 20:17, 5 September 2013 (UTC)

Uhh, I thought it was self-explanatory, but obviously not. My understanding is that most WWII photography was black and white. Those "not coolourblind" (which may well be deuteranomaly) could not distinguish what the camouflaged objects were in these black and white images - that is, against them, the camouflage was successful. But those who were "colourblind", were not "fooled" by the camouflage, and could see what the camouflaged objects were. Are you saying that none of this is true?

Old_Wombat (talk) 10:50, 23 September 2013 (UTC)

My understanding of IM's criticism is once a black and white photograph has been taken, then any issue about color perception has been removed. There are no colors to perceive differently: everything is gray scale. On the other hand, it is entirely possible that real-life scenes or color photographs to contain camouflage that works with normal vision but fails with abnormal vision. Two pigments can be a color match even if their spectra vary widely. Glrx (talk) 20:49, 23 September 2013 (UTC)

Edit request on 9 August 2013

In the Further Reading section, please change McIntyre,D. John to McIntyre, Donald (this is the correct name; I've got the book) JimCaligari (talk) 21:11, 9 August 2013 (UTC)

Done. Glrx (talk) 22:15, 9 August 2013 (UTC)

Tritanopia and blue-yellow distinction

While Tritanopia is commonly referred to as blue-yellow color blindness, the statement that tritanopes cannot distinguish blue from yellow is wrong.

If you look at this image in the article:

Blue and yellow are clearly distinguishable (blue appears green, yellow appears pink). Tritanopia should more accurately be called blue-green color blindness, since tritanopes actually cannot distinguish blue from green. ANDROS¹³³⁷_TALK 16:23, 24 September 2013 (UTC)

The use of the rainbow flags is disputed; there's a perception issue; see above. That two particular monochrome colors can be distinguished is not surprising; shifting the colors slightly might find an isochrome. The rainbow flag colors were not chosen to highlight abnormal vision. Diagostic tests for symptoms do not used saturated colors. Glrx (talk) 23:04, 27 September 2013 (UTC)

The problem is that there are no actual yellow cones in the human eye; Tritanopia is the lack of blue cones, and thus everything is seen in shades of red and green. Based on the image, it appears the red cones are more sensitive to yellow, while the green cones are more sensitive to blue. I personally think the term "blue-yellow color blindness" was named for the sake of completeness, and for the fact that tritanopes cannot see (NOT distinguish) the colors blue and yellow. ANDROS¹³³⁷_TALK 20:05, 7 October 2013 (UTC)