In most cases, blurred vision could result from infection,inflammation, trauma, and other diseases. By the way, blurred vision can be a symptom of increasing ages. In rare cases, wearing contact lenses for a long time may cause blurred vision. In my opinion, you should go to see a doctor and find the reason why you get blurry vision. Then get professional treatment.
As a matter of fact, blurred vision may begin all of a sudden and then disappear quickly. This is normal depending on the causes that lead to blurred vision. Forex ample, when your eyes are refocusing on a far object after sun overexposure, it may cure itself suddenly.
In order to avoid blurred vision, we should protect our eyes from harm. Leading a healthy life style and using eyes properly can be of much importance.