Blurred vision and swollen eyes can be caused by the following conditions: a. A history of refractive error in the eyes, including myopia, hyperopia, astigmatism, and adults who begin to see after the age of 40. If you spend too much time with your eyes will lead to eye fatigue, in addition, when the difference between myopia, hyperopia and astigmatism of both eyes is large, eye fatigue will occur when you look at things for a little longer, showing blurred vision, accompanied by eye soreness and swelling; second, dry eye, the incidence of dry eye has increased significantly in recent years. The reason may be the patient’s own age, frequent use of air conditioning in summer, high frequency use of electronic products, etc. Dry eye can also lead to blurred vision and eye swelling; third, there may be glaucoma, glaucoma attacks blurred, accompanied by eye swelling, headache, nausea, vomiting, etc.