On 9/17/2011 6:03 AM, Tim Cook wrote:
> Query: is this a matter of how the human eye sends data on to the brain,
> how the brain processes the raw eye-data, or a combination of the two?
> Are the values the same for everyone? If they're not, what's the range
> that different people see?
>
Almost impossible to say. None of us have a "name" for colors that 
contain both red and green in them, because, except for some situations 
where you cause over-saturation, and some people "briefly" see a 
confusing color that they normally don't, the processing basically robs 
us of that range of colors. Some people, have four types of receptors, 
so can see more colors, sort of, than we can, but without the "language" 
to go with it, there is no way to process that into something tangible, 
unless, by shear chance, a situation arose where someone "needed" to see 
the differences, which is bloody unlikely. Otherwise, short of testing 
it, there is no way to say precisely, save that it ranges from "not able 
to see that color" to "everything is shifted slightly, so they don't see 
some slice of the color range as clearly. I have no idea if certain 
genetic forms produce a wider, or narrower, range, but that is likely, 
so it could be shifted, or missing things on one end of the spectrum, or 
the other, or both, etc.

In short, its a damn mess. lol

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