This doesn't sound reasonable to me. First of all, they are selling some kind of glasses "designed to enhance the signal that primate color vision evolved to detect: oxygenation variations in the skin." Granted I am not looking at their paper about this, but it seems shifty.
They are saying that primate color vision with the contrast between red/greens evolved to detect oxygentation variations, despite the fact that chimps are covered with fur, and that ripening fruit has tones of red and the leafy background is green?
In addition, I work in a medical field, and I am super doubtful that red/green color blindness (which is usually not a complete color blindness but more like a difficulty discriminating) makes a clinically appreciable difference. If you miss someone being a little bit jaundiced or a little bit red, if they are really sick then they will eventually get more jaundiced or red, and you will see it. Would that lag really make an impact on their outcome? Idk, but again, seems pretty unlikely.
But buy their glasses!