Well, for double vision, it is a condition in which, whenever you look at any object, you see its two images rather than one. This is also referred to as double vision. It is totally different from blurred vision, in which you see a single blurry and unclear image of an object. It can severely harm your decision-making capacity and quite often, if you insist on driving, put others as well as yours life at risk. On the other hand, astigmatism is merely a visual condition of the eye that is caused by its shape. Astigmatism can result in an eye that has two different powers, and also it splits the focus point into two different partial focus points. In many cases, you should know that blurry vision is the most common symptom of astigmatism. Anyway, they can be different from each other.