Stuff breaking that didn't used to. I got back from a 100 mile motorcycle ride in August and found out the next day I had a detached retina. Three weeks, no riding. Last week I fell on my back while getting out of a ditch. A couple of feet, soft dirt, flat on my back, didn't even hurt. The next day I couldn't get out of bed. Turns out I had broken a rib, so another week or so with no riding.
OTOH, I am still able to ride my Harley, so I'm thankful for that. My kids are all grown and have good jobs, and they're all happy to pitch in and help the old man out. And nine grandkids can be a HUGE help around here. Last weekend my son and grandson split enough firewood that I won't have to for a few weeks. Son and youngest daughter mowed seven acres so we could have a dove hunt on 9/1. Speaking of grandkids, they're all under 16, but three of the boys are taller than I am (granted, that's not saying much).
As far as eyesight, I've been wearing glasses for over 50 years. Still corrected to 20/20.
One thing I have noticed is that during the holidays, we are often the oldest generation there.