It is not normal for you to have large pupils for a long time. Usually when you are shocked or surprised, the pupils may get dilated. However they will get released for a while after you calm down. If your eyes get infected because of the invisible bacterium, your pupils will also get dilated. You need to use some eye drops to release the symptom. You could also use the warm compress to make the eyes get comfortable and moisture.
Well, for your situation, I have to say that you may suffer from dilated pupils. Generally speaking, when dilated pupils occur, the black part of the eye (the pupils) is bigger than normal. In other words, we can say that dilated pupils look like a big black circle. For the causes, according to some experts, high blood pressure and anxiety can be the most common ones which will cause pupils to be dilated. Also, drug use, illness, and trauma are other causes. So you can just check it with your own situation, so that you can pay more attention to it.
Dilated pupils are often caused by the following reasons:
1.When you are in the darkness, you pupils dilate to let more light in.
2. Some drugs or eye drops cause dilated pupils.
3. When a person is hungry and see food, he will have dilated pupils. When a person is happy, painful, nervous, scared, he may have dilated pupils.