Dalton
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John Dalton was the first person to scientifically investigate colorblindness. His findings were published in a 1794 paper entitled “Extraordinary facts relating to the vision of colours“, exploring the colorblindness of himself and his brother. He hypothesized that the vitreous humor in his eye was tinted blue, selectively absorbing long wavelengths of light, but an autopsy after he died in 1844 revealed this to not be the case. A study in 1995 analyzed his DNA from preserved eyeballs and found that he likely had Deuteranopia (Hunt 1995).