| Show color blindness Klind ness the term color blindness implies an entire absence of the color sense and there are a few persons who are in this condition but it al also alo o includes all the forms of partial color blindness in which the perception of one of the fundamental colors red green and violet is wanting wanti tig and which are lacown as red blindness green blindness and violet blindness the line between these various kinds of color blindness and a perfect perception of colors is not sharply drawn so that a largo large number of persons ris have what is called a feeble color sense which falls short of actual color blindness there is no doubt that color blindness in its various forms is much more common than is generally supposed and it is more common among the imperfectly than the well educated classes sud it is is curiously enough still more common among jews and quakers probably from hereditary causes it is ten times more frequent among males than females in the general population but among quakers it is nearly the same in both sexes in the general population 4 16 per cent or about I 1 male in every 2 25 5 are color blind new york ledger |
