If you hold your phone farther away to read it, or the font looks less sharp than before, your eyes may need attention
https://healthyeyesight327.slatecurrent.com/posts/child-squinting-at-road-signs-or-screens-it-may-be-time-for-an-eye-exam
If you hold your phone farther away to read it, or the font looks less sharp than before, your eyes may need attention. An exam can confirm what is changing.