I am not an opthamologist, and the following observations are subject to
correction by someone more knowledgable.
I recall a special issue of Scientific American on the human eye a few years
ago which included an article on color blindness. At that time, there was
the familiar Ishihara Color Blindness Test, administered to military
recruits and to school kids---where one either did or did not see numbers on
a mosaic backdground-- and red/green color blindness was discussed briefly
in all the high school biology textbooks, usually with a lame
black-and-white photo of a traffic signal. However, the article revealed
that most instances of color blindness (which I think occurs mostly in
males) involved nothing as dramatic as a flat inability to differentiate red
and green, which occurs but is relatively rare, if I recall.
Most color blindness involves inability to differentiate "earth" tones
combining gray, green and yellow and is rather more subtle. In my own case,
I looked at the article's accompanying illustrations and realized that I was
among those affected. That in turn answered another question I had had for
some years. As a rabid fly fisherman since the late 1960's, I had examined
color plates in Ernest Schwiebert's seminal "Nymphs", which the author
himself had painted and which contained the subaquatic forms of a great many
insects in meticulous detail. I had stared at dozens of insects that
appeared, to me, identical, and had wondered why this was so. Now I
knew---they were all different, but I could not differentiate them.
I don't think too many folks will have a problem with saturated primary
colors used as identifiers.
Garry, NI6T
>
>
> In a message dated 2/23/2003 6:59:23 PM Greenwich Standard Time,
> k3ww@fast.net writes:
>
> > REd and Green? arent some folks colorblind to that? would still need a
> > symbol N or W but they look alike to
> > guys with weak eyes..
>
> Wow, I forgot about color blindness. Well, maybe RED and Black like the
> Packet Spots window has? Or better yet, have the color selection be menu
> driven as with other windows.
>
>
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