HAL9000
So far with the iphone 8+ on 15.5, I can use it for messaging, gps, etc without too much trouble. I still can't read or surf on it though. It's definitley an improvement over any of the samsungs that I have (note 9, s21 ultra). I will most likely be keeping this iphone 8+ because all other devices so far cause far more headaches and eye strain.
For settings, I did what someone else mentioned in this thread:
Reduce white point, Reduce Transparency, Increase Contrast, use it on "Zoomed In" feature. I also made the font bold and increased the size as well. I keep brightness as low as possible without having to strain my eyes to read the screen.
I was thinking how I haven't read a physical book in 15 years. Today I picked one up and started reading in bright sunlight. It almost felt like my eyes can finally focus on something. I don't know why but it feels like for some of us we have trouble focusing on a screen. There's maybe too many layers and our eyes can't get fixated on something. Maybe that's why ereaders are more comfortable.
Phones I've tried so far:
iphone 11: No good
xperia pro 5g: My fav phone, used it for a year without problems then all of a sudden unusable, which led me to the rabbit hole of led strain.
All iphone 13's: no good
All iphone 12's: no good
iphone se 2022: no good
Samsung note 9: no good
Samsung s21 ultra: no good
Motorola: g100: no good
iphone 8+: tolerable for quick tasks (only had it for 2 days so will continue to update)