Sunlight in itself is unlikely to trigger seizure. However, sunlight reflected off wet surfaces, seen through leaves of trees, or when walking quickly past railings where the sun is shining through, could trigger seizures in people with photosensitive epilepsy. Wearing polarized sunglasses out of doors on sunny days can help to minimize the risk of seizures occurring, although it will not remove it entirely. The lenses work by removing reflected horizontal light. Your optician or retailer should be able to tell you which of the sunglasses they stock have polarized lenses.