I had the same. All the opticians I was visiting were giving me prescriptions so I could see while driving (which I didn't realise). I went to an eye hospital w

I had the same. All the opticians I was visiting were giving me prescriptions so I could see while driving (which I didn't realise). I went to an eye hospital with more sensitive equipment as I thought something was wrong with my eyes. They said no problems, I just needed a weaker prescription for computer use - they gave me one that was 0.5 dipole less. It might not sound like much, but made a big difference. I think that ordinarily your eyes would be able to adapt (and mine probably did when I was younger), but as I'm getting older my eyes don't adjust as easily as before.