Glockmatic said:
I think it means that we our eyes are pretty much all the same in how they work; they take in light that is not absorbed from the object it is reflected off of. The only way they could see another colour is if they're brain was totally fucked or they could see another light we cannot see (such as ultraviolet or xray etc)
the tongue is the same but we taste thing differently, Even if the brain is the same, no one knows how others perceive the color blue.