>How could someone who is color-blind know that what looks like green grass >to him is our equivalent of brownish-orange. He wouldn't have any reference >point to make that equation. >Skeptically, >Adam Wathen Adam: I replied privately to Eunice earlier, but let me address your perception. I am partially color blind (color weak, actually), and come from a family in which this is not uncommon (my maternal grandfater was totally colorblind, my brother red-green blind). Most people have the common misconception that "color blind" means blind to that color. Not so. While my brother cannot necessarily tell red from green, he Can tell those two shades from anything else. They don't look "browish-orange", rather they both look like what he has Learned to be either red, or green. People can learn these things. For me I have trouble with blue and purple, but have learned that, To Me, "purple" is blue, with a reddish undertone. Sure, I know it IS, but "normally" sighted people just look, and see, purple. I take two steps. My brother has learned that certian things are green (like grass), and so might see the coat in question as either Red or Green, but it woudl still be enough to make it stand out from the B&W. Color blindness is not well understood by the public at large. I suggest that those of you who are teachers become aware that not everyone sees colors the same way you do, and that colors are not (from a perception stand point) the absolutes some seem to think... brucer Bruce T. Ritchie Media Educator/Technician Photographer Writer & Poet http://www.mindspring.com/~brucer1 http://members.tripod.com/~quoddybay/index.html ---- Screen-L is sponsored by the Telecommunication & Film Dept., the University of Alabama: http://www.tcf.ua.edu