As someone with Atypical Monochromatism, I was extatic When I saw these, I nearly shit bricks. till I found out they can only solve specific colorblindness like red-green, or blue-yellow or stuff like that.
I had the money saved up and everything to buy these fuckers. And I crushed my own dreams when I did some research.
TLDR, these things are cool. I kinda hate them nao though, haha.