Well, generally speaking, it is very normal to have this symptom. For the reason, I have to tell you that the light is so strong that when we open our eyes to see it, it will just make the eyes be hurt. And also our eyes are so very sensitive that they will react to the stimulation from sun light. When the sunlight gets into our eyes, it will make our eyes to adjust to it. And at this time, it will water. So it is very normal. And also, there are many dirty objects in the air outside, so when you go out, your eyes are easy to be infected by them. In this situation, maybe you should go and see a doctor so that you can talk about your problems, then can have the eye exam. You should not make your eyes to be exposed under the sunlight for a long time, also should be careful about the dirty things outside.