After severely damaging my eyes with phone use this year, I'm going to be transitioning to mostly using a smartwatch and a laptop instead, and I would encourage you to do the same. Phones are so perfectly designed for eye strain that may not alarm you until you're seeing double. Don't just put up with it until it's too late and you're forced to swear off screens for a month like I did. There's a reason for the massive increase in youth nearsightedness in recent decades.