Coping with Colorblindneadcs of vision, Dr. Leo Hurvich, for each of th~~rest in my effort to explain this complex t01~focus on the human factor--real cases.~osenthal, a computer systems engineer, wbrom the early days of the computer grap~arged that I speak up, especially since he nora1ork was done by physicists, mathematiciamwell-versed in cognitive studies, and as he al~blind. His professional and personal critiawarm support through the years is most apptr of this volume, was instrumental in whipp~it a reality at long last. Heartfelt thanks are dt~~ks to Alexander M. Milenic and Lorelle F~), and to my daughter Heidi Rosenthal Vin .~(Lsband is colorblind) for reading portions of4at the general reader would find it clear4Two hundred years ago, the distinguished British scientist John Daltonpublished the first significant explanation of color vision confusion. Infact, he was describing his own condition and that of his brother. Onewould think that much research and writing on this topic would havebeen done since that time, but this is not the case. Through the years, Ihave become increasingly aware of the public's lack of knowledge aboutcolorblindness. I first became interested in the subject in the 1960s when I taught com- graphics at DeWitt Clinton High School in the Bronx, which was a rough, all-boys' school. Although I was preparing students forlx~tial jobs in the real world, to the school counselors, art courseswere a way of dealing with trouble makers, a kind of therapy to sootheuvage beasts who would not sit still for academic work. At one point, four boys who were thrown out of shop class landed inmy room. What was