My father is red-green color blind. And frankly speaking, until he told me, I never noticed that. And he even got a driver's license in the old days (I mean 198X).
While I'm lucky enough to have full color vision, I find myself can't imagine how color blind see the world. Sometimes I wondering if I'm color blind but just don't know that. (Several tests on the internet said I'm perfectly fine)
The thing is, how I can tell I'm color blind if I don't know what color I don't know? When talking about the flavor, I found my father and I are not sensitive to the taste of sour, while my mother is. For the same dishes, my mother thinks it is unacceptable sour, while my father and I think it's not sour enough. If I can't taste the sourness at all, how do I know I have that defect?
I'd rather not think this deep hole of a thing of philosophy. I guess it's a philosophy thing. Surely it's not literature.
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MegaLag's video about color blind glasses
https://www.youtube.com/watch?v=Ppobi8VhWwo
https://www.youtube.com/watch?v=_QQtOv2PlOE