Hi friend, it's good to hear writing is not only a habit but also a way to express yourself and it brought you friendships,
If it comes to the eyes, many complain about the screen. The biggest problem is the light (of the cellphone) but also the staring we do.

It will be good to reduce the time you write. Set that timer for 10 minutes it's enough time to write and you will see you learn to write the most necessary or how to ventilate,

Simply reply on 2-5 comments and close down. It's the best way and you can still stay in touch,

Health first,
I wish you a great weekend without pain and hope the health issues will be solved so you can buy something with a bigger screen,