If you don't want to read after you've done your homework, you can listen to music to soothe your mind, take a walk to walk around, talk, close your eyes, and communicate on the phone.
The best case scenario is to go for exercise, keep exercising regularly, you can make the body and mind healthy, there are times when you will feel that although you are physically tired, your spirit is exhilarated and pleasant.
If the time spent on doing homework is too long, you really should not do business with your eyes any more, but if the time spent on doing homework is too short, it really doesn't matter, then you can read books, write, do some activities of your own hobbies, such as playing chess, painting, playing the piano, and so on and so forth.