It certainly can affect reading. As the other commenter stated, it can affect people in may different ways. It affects my reading differently based on the content. Ask me to read a textbook for a history class and I won't make it more than a few sentences without serious distraction. If I somehow actually "finish" reading a chapter I still won't be able to tell you much if any of the content. But give me a good sci-fi book and I will burn through it in a matter of hours. And good luck getting anything else out of me during that time.
