I use OPPO Find X5 for 1.5 years with no problem comfort level 10/10. I had a little pain for first couple of days, but later it disappeared.
But when I tested 3 more same model phones I had 3/10 it was impossible to use them, and it was a SAME model with SAME android and firmware versions.
Also I use OPPO FInd X3 Neo 9/10 no issues
OPPO Find N2 Flip 9/10 no issues
Samsung M11 7/10 for 30 minutes, after a small break it is usable again.
This is a cheap OEM Samsung phone made by a partner company, I can use it, but ALL another Samsung made phones are unusable for me.
Sony Xperia E5 - old android 6 phone, eyes 10/10, I've been using it about 8 years until found M11.
Hope it will be helpful for somebody. I've tried more then hundred phones from 2014 and all other phone are unusable for me.