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.