yes, it is very possible to get watery eye because of fatigue. And it is said that the eyes are the center of fatigue of the whole body. If your eyes are tired, they may swell, be filled with tears and you may get blurred vision as well. If the situation is getting worse. You may vomit, be upset and get insomnia.You can check the other aspects of your health to see if you have some other symptoms to affect your daily life, for example, whether you feel upset and feel like you get cold. If you have the symptoms, your illness must be caused by fatigue. Besides, you may concern the illness of dry eyes. If you feel your eyes are tired and watery, you may have this kind of illness.To cure watery eyes, you should pay attention to the use of computer. Have a rest after 40 or 50 minutes of using computers. Besides, you need to do some eye exercise and use some eye drops.