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I read “eye makeup” very differently at first, and thought, sure, strange eye shadow could change the color of the light that ends up in ones eyes....

the article seems to skip over the entire field of colour science. there is a colour space for the human eye. it's called LMS. there is also a colour space, derived from it, called CIEXYZ. it's the colour space that all ICC profiles are specified in. they are RGB-like in nature and correspond to the three types of cone cells in the human eye. there are other colour spaces that derive from it, such as CIELab and CIELuv, which are luma-chroma versions of XYZ.

Indeed, I discovered from a picture of a heterochromatic cat that my blue-green perception is different in each of my eyes.