I see halos around lights too, which impact my night vision a lot. It is quite annoying. Halos are bright circles around the light source which is very obvious in night. Yet not everyone has this problem. Halos can be common response to bright light, however it is, sometimes, an indication of some possible eye problems. Halo is a very common symptom of cataract. Normal lens is crystal clear, while cataract makes it cloudy and opaque, which distort the light traveling through and resulted blurry vision and halos. Other refractive problems also cause halos and glares, including myopia, hyperopia and astigmatism. I have myopia and astigmatism, which is exactly the reason why my night vision is so poor. The halos and glares make me very uncomfortable and fail to drive in night. People might have halo vision after Lasik or PRK surgery, but it is just a temporary symptoms which will solve after the corneal wound healed up. You should have an examination to see what is the problem with your eyes. All these possible causes are not serious which could be fixed. Don't worry too much.
