Actually, it's really an essential point to prevent children from infections by stopping them rubbing their eyes. Cause many bacteria always sticks to children's hands, and by means of rubbing their eyes, their dirty hands become the spread of bactria. In serious situation, it can lead to many eye diseases. Kids usually rub their eyes when he feel eye itches, eye drys. So, you must observer if his has such symptoms. If so, he may get eye infection or just dry eyes. You'd better have her a comprehensive eye test to see what's going on. And then take the right way to treat his eyes. As long as he feel good and comfortable, he won't rub eyes again.