Can using computers and smartphones cause dry eyes?

Hi doctor,

I suffer for about half a year from something like an eye strain. Almost every morning I cannot really concentrate or think clearly when I look at my phone or computer for a while. This feeling then persists if I keep looking at the phone, but if not it usually goes away in about an hour. It is a huge problem for me, for example when I have to do my work on a computer or when my friend just simply wants to show me something on their phone. And I also mentioned that it is usually in the morning because for some reason it tends to get better as the day goes on. And it also gets better when I exercise. Nonetheless, when I woke up the next day, it was the same problem. My dominant eye also tends to dry up when I cannot think clearly after looking at the phone. It is really weird and it is oppressing my life in a serious way. If you have any suggestions I would love to hear any of them. Thank you.