I haven’t heard of Galtonism. From my experience as the colorblind child of native Russian speakers, it’s Daltonism (дальтони́зм).

https://en.openrussian.org/en/colour-blind

Good lord, I had both of their wiki pages open, and STILL somehow D and G were the same letter in my mind.

I should just delete my comment, but let it stand as a monument to my goof.

Perhaps you suffer from D-G letterblindness.

It would be totally understandable for someone who reads handwritten Russian to confuse D and g in their mind.

https://en.wikipedia.org/wiki/De_(Cyrillic)#Form

Oh man, I don't think I've written cursive Russian in something like a decade. I honestly have no idea how Russian historians parse old documents; old hand-written English is hard enough, but cursive Russian is a whole other thing.

My last name just looks like a child drawing a wavy ocean!

He gone doofed.

Quite a lot of languages use daltonism actually: French (daltonisme), Spanish (daltonismo), Italian (daltonismo), Portuguese (daltonismo), Catalan (daltonisme), Romanian (daltonism), Polish (daltonizm), Russian (дальтонизм), Greek (δαλτωνισμός), and Turkish (daltonizm).