I'm 61 and although I have worn glasses since I was 13 I started wearing graduated bifocals at age 55.
As a classical musician I was misreading some passages above the ledger lines in the score and one doesn't stay employed if you can't see perfectly.
I'm quite comfortable with the bifocals and it solved my fading eyesight issues.
In my check up it was discovered I had elevated pressure in one of my eyes so I am on a 'glaucoma' watch and have field vision and pressure tests every 6 months.
(Since I am Canadian,that is covered by our Medical Services Plan.)
Having to get up in the night? Haven't encountered that yet.
Aches and pains? As a string player I was very concerned I was a prime candidate for rotor cuff damage but I started lifting very modest dumbell weights at home and those pains and worries disappeared.
Fat? I try to walk everywhere I can and since I live in a major city I can walk to work or even take transit which is convenient. If I had a car Id be 300 pounds! (I'm 180 and vain.)
Sex? In spite of all the ads on TV,I have not experienced the dreaded "erectile disfunction".
I have had more sex since I turned 45 than I did except for maybe ages 15-25.
I saw many of my friends and colleagues die from AIDS in the 80's and that was a defining experience in the way I live my own life.
I think of all the wonderful things that have happened in my life since that time and how so many of us never made it out of our 30s. Such a waste and I catch myself thinking even 30 years later - wouldn't so and so have loved this...
I am not partnered,but I am not lonely and I am lucky enough to have friends that I had when I was 18 and I make sure I make new ones as well.
For you young'uns... don't take your friends for granted. You will be so much happier when you are 60 if you are lucky enough to still have them with you.
There is no escape from aging but that is something we all handle in our own way.