It makes flowers and trees grow, it warms our bodies and elevates our moods. Life itself would be impossible without the healthful effects of the sun.
But too much of anything can be harmful, and this is true of sunlight, too.
Overexposure to the sun's ultraviolet (UV) radiation can cause a variety of eye problems, including cataracts, macular degeneration, non-cancerous growths on the surface of the eye (pingueculae and pterygia) and even cancer of the eye and eyelids.
Most UV-related eye problems occur very gradually after many years of repeated UV exposure. But it's also possible to get a painful sunburn of the eyes (photokeratitis) from just a few hours in bright sunlight.
This interactive guide will help you become more aware of the hidden dangers of UV radiation from both sunlight and man-made sources and how to protect your eyes for a lifetime of healthy eyes.
UV Map Index: See today's local UV levels.