Well, yes, it is normal to have sore eyes, when you are tired. Generally speaking, when your eyes are tired, it will just increase the eye pain. And in that way, it can just lead to a lot of eye problems, such as sore eyes, even dry eyes. And when you suffer sore eyes, your eyes will feel itchy, dry, and painful and discomfort. So you should try some ways to cure it. For example, you can make an eye pack made from chilled cucumber slices. Just put those under your eyes, and it may be very beneficial. Of course, you should have a good rest and then, it will be fine.