> 1 in 12 men and 1 in 200 women go through the same sorts of experiences,

Almost everyone to an extent loses some colour definition in their vision as we age, even those lucky enough to have excellent colour vision to start with, some lose a lot more than others and it is gradual so mostly not noticed at first. The is one of the reasons many grandparents have the saturation oddly high on their TVs (the other main reason, of course, being they've just never changed it from the default that is picked to make the display “pop” under bright show-room lighting conditions).