Some patients may experience distorted vision after prk surgery. Some of them may experience a glare at night, and some of them may see halos surrounding objects, and some patients may just like you experience double vision, that is always happen after prk surgery, what you should do is follow all your doctor's recommendations and have a good rest, You need to give it more time, maybe a week or a month, that is hard to say, just be patient and wait the double vision go away.
Yes, it is normal to have the double vision after the prk surgery. Because of the rise and down of the eye pressure, the vision will be a little blurry after the prk surgery. You may need to wait for a week to get the basic recovery. Then about a month, you will get the full recovery. During this time, you should protect your eyes carefully.