Color blindness all variations in human color vision involve the red and green receptors in male eyes. It is very rare for males or females to be "blind" to the blue end of the spectrum. The first scientific paper on the subject of color blindness, "Extraordinary facts relating to the vision of colours", was published by the English chemist John Dalton in 1798 after the realization of his own color blindness. Because of Dalton's work, the general condition has been called "daltonism", although in English this term is now used only for deuteranopia. Color codes present particular problems for those with color
Moral blindness onwards, through Epitectus and Kant, but came into full prominence with Ethical intuitionism. Figures like G. E. Moore argued for a "direct moral awareness" and saw moral blindness as the equivalent of colour blindness. Melanie Klein saw early development in terms of the child slowly emerging from a state of narcissistic blindness to recognise the motherer as a moral end in herself, not simply as the child's means or tool—a step she called the depressive position. D. W. Winnicott similarly saw the infant as moving from —from an unconcerned use of the mother to concerned usage. Zygmunt Bauman considers certain