Photosensitivity All patients who receive PhotoBarr will be photosensitive and must observe precautions to avoid exposure of skin and eyes to direct sunlight or bright indoor light (from examination lamps, including dental lamps, operating room lamps, unshaded light bulbs at close proximity, neon lights, etc.) for at least 90 days after treatment as some patients may remain photosensitive for up to 90 days or more.