Kai Cao | Akateeminen Kirjakauppa

Color blindness or color weakness affects about 5 per cent of the world's population, and testing for color blindness is increasing important, as many occupations require good color vision now. This collection of color plates enables testing for color anomolopedia (color blindness), with an analysis on the genetic factors of different kinds of color blindness, occupational and professional needs for the tests, and directions for giving the simple tests for Type 1 (red-color blindness), Type 2 (Green-color blindness), as well as various grades of red-green weakness and other conditions.