Re: [OM] TETRACHROMACY

[ChrisB]

Very interesting, Mike, thanks.  I had to use my dictionary a few times . . .

>From the article that I heard, only women are tetrochromats.

Chris

> On 29 Oct 18, at 23:54, Mike Gordon via olympus <olympus@xxxxxxxxxxxxxxxxx> 
> wrote:
> 
> Haven't read about this in awhile.  Much data came out in Neitz lab in 
> Seattle and Jordan.  
> 
> https://jov.arvojournals.org/article.aspx?articleid=2191517 
> <https://jov.arvojournals.org/article.aspx?articleid=2191517>
> 
> 
> There was only a functional test in past using silk swatches.  Curiously they 
> only tested women of course as it is essentially impossible for men to be 
> tetrachromat.  In above study only a very small percentage of women 
> genetically shown to have the anomalous trichromacy or tetrachromat could 
> actually use it.   In the early functional studies there were some men 
> (working daily with color) that could perceive the same number of hues.  
> Whether this held up
> with true genetically determined tetrachromats that are highly functional 
> tetrachromats I do not know.  Post processing does play a role as well as the 
> pattern of the anomalous cone distribution as determined by random X 
> inactivation. 

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