... yourself a favor: Get the right glasses !
Let me tell you my story: With age the eye will adapt less to watching things in different distances. So I have gotten myself variofocal glasses. And a stiff neck and strong headache, when working a lot in front of a screen. Why ?
Because the area needed for the screen distance is placed low on the glass. To see a sharp image I had to raise my head, which created stress to the neck. Whenever I worked long hours like that, everything stiffend up and gave me all sort of trouble. Little exercises to loosen things up helped, but not for long.
Then I got myself new variofocal glasses, just for the screen work. They are not set to „infinite“ on the far end, but to about 3-4 m, and the low end is document viewing distance. When I look at the screen, the head has a natural angle now, and the stiffness and sore is gone.
They make good reading glasses, too.