Well, yes, generally speaking, there is a risk to have retinal detachment when you are pregnant. Especially you have myopia. It can be dangerous. So if you are pregnant now, you should be careful about it. As we know that, when people get pregnant, there will have Preeclampsia, which can also cause swelling, particularly in the face and hands. Also, it may also be accompanied by other symptoms such as blurred vision, headache, nausea, and pain in the upper abdomen. This is very normal to have. But on the other hand, some serious visual problems may occur, because high blood pressure stresses the retina, pushing it forward. In extreme cases, this can lead to retinal detachment and possibly blindness. So in this situation, you should go and have a conversation with the doctor, so he can tell what to do. Besides, swelling can lead to weight gain outside of the normal weight gain expected during pregnancy. Anyway, just be careful.