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
A Study on Iranian Theatre field. Later, its publication was entrusted to Roshangaran Publishing, which came to be Beyzai's exclusive Persian publisher. Author's Page on openlibrary.org A Study on Iranian Theatre A Study on Iranian Theatre (1965) is Bahram Beyzai's seminal research on theater in the Persian world from the ancient times to the twentieth century. It has been described as "the definitive work on the history of Persian theatre." The chapters of the book were published as articles in advance, i.e. 1962 and 1963. In 1965 the writer published them as "namayesh dar Iran" (literally meaning "Spectacles in Iran") with the English title of