When you are pregnant, pregnancy hormones will decrease tear production so that lead to eye dryness, irritation, and discomfort. Hormones will also cause fluid buildup in your eyes, which can lead to changes in the curvature of your eye. In fact, blurry vision during pregnancy is quite common and normally last for a short term. And please pay attention to the following things: if you are a glasses wearer, do not change a new one until your baby is born; try to wear glasses instead of contact lenses; if your notice blurry vision don't go away, or double vision persists for more than two hours, call your practitioner at once to check out the reason and have a treatment.