Explanation:

John Dalton described his own color blindness in 1794.Dalton supposed that his vitreous humor was tinted blue, selectively absorbing longer wavelengths. He instructed that his eyes should be examined after his death, but the examination revealed that the humors were perfectly clear.John Dalton, a chemist, physicist, and meteorologist was best known for introducing the atomic theory into chemistry. He was also the first scientist to study color blindness, publishing a paper on the topic, entitled, Extraordinary Facts Relating to the Vision of Colours with Observations. After discovering his own color blindness, he began conducting rudimentary tests on his friends to see if they shared his color vision impairment. His observations contributed to the discovery of what we now call color vision deficiency (CVD) or more commonly known as color blindness.