I'm 54 and when I hit 50 my eyes started not working as well but there are habits I had that probably increased this atrophy.

Yes, your body is material and all material things wear out. In this age of Kali Yuga which will end in less than 5,000 years. Your body will barely reach 100 and towards the end an old person will be in their 30s.

Spiritually this is a great time to center with The Supreme Godhead. Your spiritual life has no expiration date so it's a great time to use your material body to serve God. Your are serving anyway but happiness will come by mindfully doing so.