Talk:Monochromacy

message: Color Blindness or Daltonism is a human condition that doesn't show symptoms of monochromacy and then it will be better to remove information about color blindness from monochromacy. See Color_blindness.
Moreover many information about color vision are in Color_vision, both for humans and animals.
It will be better to consider here only monochromacy not to explain again color vision.  — Preceding unsigned comment added by Renata.sarno (talk • contribs) 22:56, 2 March 2016 (UTC)
thread_title: Color Blindness elimination 

message: I did some few corrections. There are a lot of mistakes about Blue Cone Monochromacy in this page.
A full article about Blue Cone Monochromacy is in my sandbox.
May I remove colorblindness from this page ? Colorblindness is not a monochromacy. 
Renata.sarno (talk) 17:15, 28 February 2016 (UTC)
thread_title:  Blue Cone Monochromatism 

message: Humans ? Animals ? It is not really clear what you are speaking about.
1. In humans Achromatopsia is a rare genetic disorder inherited throught 4 different genes with autosomal recessive inheritance. It is a severe eye condition.
2. In humans Blue Cone Monochromacy is a rare genetic disorder inherited throught Chromosome X.
It is a severe eye condition sharing some symptoms with achromatopsia but different from achromatopsia.
3.In humans daltonism with the lack of opsin MW protein or opsin LW protein is a less rare  genetic conditions affecting 5-8% of males. Daltonism is inherited with Cromosome X but it is not a severe consition. People with Daltonism don't have photophobia or nistagmus or poor visual acuity.
4. other rare form of monochromacy, related to daltonic people who loose also the S-opsin protein, could not have severe symptoms because in these form of monochromacy the fovea centralis is filled of functioning photoreceptors like in daltonism.
I really think it will be important to have single articles for Achromatopsia and for Blue Cone Monochromacy as well as a page for daltonism. All these pages can be linked from pages related to inherited retinal diseases or genetic retinal diseases or eye diseases.
the situations for animals is very different.
Renata Sarno - BCM Families  — Preceding unsigned comment added by Renata.sarno (talk • contribs) 16:54, 28 April 2014 (UTC)
thread_title:  Daltonism ? Achromatopsia ? Blue Cone Monochromacy ? please put order don't mix everything ! 

message: Quoting article: "The perceptual effect of any arbitrarily chosen light from the visible spectrum can be matched by any pure spectral light.".
It seems to me that "any arbitrarily chosen light from the visible spectrum" means the same thing as "any pure spectral light".
I suppose that "any arbitrarily chosen light from the visible spectrum" could be INTENDED to mean "any arbitrarily chosen combination of wavelengths of light from the visible spectrum".
Will someone rewrite this to make it clearer, please and thanks? Wanderer57 (talk) 13:23, 27 May 2012 (UTC)
thread_title:  How's that again? 

message: I question the validity of the "100 colours" statement and ref. 7 at the end of this section.
DJMcC (talk) 16:06, 11 September 2012 (UTC)
thread_title:  Monochromat capability 

message: I question even more in this article. If you have one type of rods plus one type of cones, why should you be completely color-blind? The rods allow you to distinguish total luminosity, and the cones would (for example) allow you to distinguish "reddish" from "not reddish". --131.152.41.173 (talk) 15:17, 11 December 2012 (UTC)
replies: text: Which means, by the way, that I don't question the 100 colors questioned above. But obviously there is a contradiction in the article. --131.152.41.173 (talk) 15:24, 11 December 2012 (UTC)

text: I'd like to see a study of that.  It's like what I call "campfire vision", where there's a general low light level but enough long wavelength to get the L cones involved at the same time as the rods.  There ought to be a bit of a color sense in that.  In more typical lighting, there's not much overlap of levels where both work.  The brain circuits to compare them might therefore not have much input to develop from.  Just my ideas... Dicklyon (talk) 06:56, 8 January 2014 (UTC)
thread_title:  Strange statements 

message: I've tagged the article for copyediting, as there are certain phrases and ways of structuring that seem out of place in an article, as well as overcapitalisation in some places. The writing also suggests potential for copyvio, so I would recommend checking for that. — Sasuke Sarutobi (talk) 22:37, 9 December 2013 (UTC)
replies: text: I did some basic style and case fixes, and fixed a few errors.  I don't see obvious copyvio problems.  But it could still use a lot of work. Dicklyon (talk) 06:52, 8 January 2014 (UTC)
thread_title:  Tagged for copyediting 

message: Achromatopsia describes the pathological phenomenon in humans, where as monochromacy describes the condition of seeing only one color. As this article points out, that could be perfectly natural in other animals. Not withstanding that difference, most of this article is dedicated to achromatopsia, and human vision is probably the primary focus of a complete article on this topic, not the fact that seals possess no blue cones. Therefore a merger and rearranging of the subject material might be in order. Both articles also possess some readability issues, with parts of each taking the tone of a technical manual. 96.251.85.48 (talk) 05:25, 8 January 2014 (UTC)
replies: text: I think a better idea would be to trim Monochromacy to be more about monochromacy in general and in animals, but to direct to Achromatopsia for more details on the human abnormal monochromacy.  Dicklyon (talk) 06:50, 8 January 2014 (UTC)
thread_title: Merge Proposal

message: This article should NOT be merged with the article on achromatopsia.  It is a completely different subject.
CAUTION:  Do not confuse "acromatopia" (no 's') with achromatopsia (with an 's').
Achromatopia or colour deficiency is just one of the symptoms of achromatopsia.  The other classic and invariable symptoms of achromatopsia are amblyopia, hemeralopia and nystagmus.  Photophobia can also be expressed if the hemeralopia is severe.
If you do not have all four classic symptoms, you do not have achromatopsia.
Monochromacy, on the other hand, only deals with colour deficiency.  It is one of the three types of colour deficiency.  The other two types of blue-yellow colour deficiency and red-green colour deficiency.  Monochromacy exists when someone has both blue-yellow and red-green colour deficiency.
The genes that cause blue-yellow colour deficiency and red-green colour deficiency are carried on the X chromosome.  Because men only have one X chromosome, they will be colour deficient if their X chromosome carries the pertinent gene(s).  Women, however, have *two* X chromosomes so they must inherit the gene(s) from *both* their parents.
Thus:
1.  A mother can carry a gene for colour deficiency without being colour deficient herself.
2.  The daughter of a mother who *is* colour deficient usually will *NOT* be colour deficient (because she would need to get the same gene from her father as from her mother).
3.  The son of a mother who is colour deficient *always* will be colour deficient, because whichever X chromosome he inherits from his mother, it is going to be carrying a gene for colour deficiency.
4.  The son of a mother with *achromatopsia,* on the other hand, will NOT usually inherit the syndrome from his mother, because genetic achromotopsia is not caused by genes carried on the X chromasome. 
5.  A person with colour deficiency usually does NOT have amblyopia or hemeralopia, and almost never has nystagmus.  They might not be able to see colours but the rest of their vision will usually be normal.
The achromatopia that happens as a symptom of achromatopsia, however, has NOTHING to do with either blue-yellow or red-green colour deficiency.  Unlike normal colour deficiency, achromotopsia, 1) need not be caused by genetics and, 2) when it is genetic, it's not caused by the same genes.  
Rather, the colour deficiency that is one symptom of achromatopsia involves the ability of the cone cells to receive and/or process light of any kind; with the result the rod cells become saturated, which causes the hemeralopia.
2601:645:C300:16DD:6DA2:295C:2C60:D470 (talk) 11:53, 18 November 2015 (UTC)
thread_title:  Do Not Merge This Article!