On Saturday, I went mountain biking briefly over at Cedar Mountain. The trails there aren't that difficult, but I kept crashing. It was mess. I'm very bad at mountain biking, but I'm not this bad. The difference between this time & all other times was that I was wearing my new glasses. Apparently, the change in focus screws up my depth perception, my balance and timing just enough to crash a lot. I rode the next day with no problems and no glasses. I Googled this problem and nothing came up.
It'd be nice to wear glasses while mountain biking, so that I can see the beautiful vistas of Connecticut, but I'd probably just fall off of them.