Do eyelashes get shorter as you age?

Well, I just turned 52, and I've always had long eyelashes, to the extent that people commented on them. Just a couple of weeks ago I happened to be doing my normal eyelash feeling, touching, pulling, whatever sort of thing, which I hadn't done for a long time and suddenly I realized they're about half as long as they used to be. It's like feeling for your arm and realizing you have just a nub of an arm. So, yes, they get shorter, but I don't know why. How odd, because my eyebrows seem to be getting longer.