After the contact surgery, the eye pressure is not stable which is the main reason for the double vision. What you should do is have a good rest both for the eyes and body. You should not eat the spicy food which may stimulate your eye nerves.
Well, 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. And for your situation, you may be infected. As we know that after eye surgery, it is easy to get infection. So you should pay more attention to it. And also, you can just go and see a eye doctor so that he can give you some advices.