An ironic aspect of this is that when i was young my dreams were always in dull colors, like 70s-era photos. As i age, dream colors become more and more vivid.

Given that, i suggest that their conclusion:

> The study is the first to use pupillometry to show that as we grow older, our brains become less sensitive to the intensity of colours in the world around us.

Should instead say "eyes" (or perhaps "visual cortexes") instead of" brains."