I should tell you that it is not crazy that you got blurred vision from coughing. Coughing will make your eyes water a lot and the excessive mucus can cause blurred vision. As to your second question, blurred vision can be caused by many other problems as well. In the one hand, blurred vision can be the result of some minor problems. They are nearsightedness, wrong eyeglasses wearing and aging. On the other hand, many a serious physical problems can cause blurred vision. Infection, inflammation, trauma, malignancy, and other abnormal processes are all possible causes of blurred vision. So before any kind of treatment, you'd better firstly talk with your eye doctor to know what's the exact cause of your blurred vision.
Coughing can cause blurred vision. More exactly, it is the tearing in the coughing process causes blurred vision. Excessive tears and mucus that blur the vision are generated in the mechanism of throat irritation that leads to coughing. Blurred vision can also be attributed to fatigue or a systemic illness. Coughing can be the symptom of lung infection which is one of the serious systemic illnesses. The blurred vision is probably an additional symptom. You should consult a doctor in order to get timely treatment.
Well, coughing is not possible to cause blurred vision, however, it is easy to cause eye infections, such as pink eye, dry eye and watery eye. While these eye disorders that accompany coughing are the real reasons which lead to blurred vision. Blurred vision means that you cannot have a sharp vision. Blurred vision can also be a normal sign of aging. In addition, infection, inflammation, trauma, and other abnormal processes are also causes of blurred vision. If you really get blurred vision, see a doctor and receive a thorough eye exam to determine the real reason.