Halos at night 6 months after PRK , particularly at seeing the traffic and street lights. Any suggestions?

Hi, I had my PRK done on march 7 2016. I was told by my surgeon that it would take 3 months for the eye to develop clear vision.However, i am deeply concerned as it has been more than 6 months and i still cannot see properly during the night. For example, when i focus my eyes on a traffic light or a street light particularly , it appears to have a stretched image. I strongly believe that this is not gonna improve.Any help or a suggestion would be highly appreciated. Thanks!