Staring at a screen does not impact your eyesight negatively. However it contributes to an eye "tiredness" (non native english speaker here, sorry), but that's

Staring at a screen does not impact your eyesight negatively. However it contributes to an eye "tiredness" (non native english speaker here, sorry), but that's all. This is from a friend of mine who is orthoptist. I also know by changing glasses recently that they have some technology they put in the lens to reduce this tiredness. At least they sell it, I have no idea if it's a real thing.