Yeah, it is normal that when you are sneezing, your eyes will be filled with water. As far as I know, there are two kinds of reasons. On one hand, maybe you have a cold, so your eyes will be filled with water while sneezing. If so, you can just take some aspirin, and drink much water, it will go away the next day. On the other hand, if you do not have a cold, there will no pills that can help you. Because you know that when you sneeze, the certain muscles in your face will be tense, of course, this case includes the tear ducts. Meanwhile, all the sinuses are connected, including the eyes, nose, mouth and ears, so your will sense that your eyes are filled with water when you sneeze. If you are on of the second group, you just let it go, because nothing can help you with it.