Re: [OM] TETRACHROMACY

[Mike Gordon via olympus]

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


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. 

Off color, Mike
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