The size of the halo is proportional to the add power, with larger halos corresponding to greater add powers. Patients may report starbursts as streaks or beams of light emerging from a single focal source. This might happen as a result of refractive error, ocular surface issues, posterior capsular folds (PCO), or diffractive IOLs. Halos are also visible around headlights during daytime driving, which is caused by reflections off of the surrounding environment back into the eye. Reflections from vehicles in front of you are called forward-directed glare. Reflections from vehicles behind you are called rearward-directed glare. After cataract surgery, patients may experience starbursts when walking into areas with many lights or when looking at bright scenes such as landscapes or sunsets. The halos are a result of light being scattered within the lens capsule and vitreous body after the lens has been removed. Since there is no lens to focus light, it spreads out laterally upon entering the eye. This results in a ring of light surrounding the patient. In most cases, starbursts resolve themselves over time. However, if you continue to see them after several months, contact your doctor to make sure that there's nothing abnormal about your vision.