So I turned 38 on Monday. That’s pretty grim, of course, but the fact is I’m in pretty good shape these days. I could have better habits, but I’m lean and do a remarkably good job of breathing, under the circumstances. What I have noticed is that my night-vision has started to suffer substantially of late. Because I live in a city, I don’t really notice this at night. Instead, I notice it when I enter a building or get on a bus with my sunglasses on. Stuff that I’ve gotten used to being really obvious has started to be difficult to ascertain under this very specific circumstance.