Glare and halos are both eye symptoms that some people experience around bright lights. Halos show up as bright circles around a light source. Glare is light that interferes with your vision, making it difficult to see or sometimes making your eyes water. These symptoms can show up at any time of the day. Halos often appear at night when the area around the lights is dim or dark, such as while driving at night. Several conditions can cause glare and halos, such as aging or certain types of eye surgery. Treatment may involve taking care of the underlying cause. Other times, you may need to avoid driving at night if the glare and halos interfere with your driving. Causes