About UV Index
The UV Index is a relative measure of the amount of solar ultraviolet (UV) radiation reaching the Earth's surface at "solar noon" — when the sun is at its highest point in the sky. It was created to help people determine the appropriate sun-protective measures to reduce their risk of sunburn, skin cancer and eye damage from the sun.
The following table shows your risk for sunburn on unprotected skin, based on the UV Index:
| UV Index | Risk Level | Minutes Until Sunburn |
|---|---|---|
| 11+ | Extreme | 10 |
| 8 - 10 | Very high | 25 |
| 6 - 7 | High | 30 |
| 3 - 5 | Moderate | 45 |
| 1 - 2 | Low | 60+ |
*SPF = sun protection factor All graphics, forecasts, and data © 2016 AccuWeather, Inc. You already know that you should protect your skin from ultraviolet radiation (UVR) and our eyes need similar protection. UVR comes from the sun and may also be reflected off surfaces such as water or sand. The best way to protect your eyes from UVR exposure is to purchase and consistently wear sunglasses with 100-percent protection against both UVA and UVB rays, according to the U.S. Environmental Protection Agency. Many inexpensive brands of sunglasses offer this protection, so you have a wide variety of choices. Remember to wear them even on cloudy days. The Medical Details: Too much exposure to UVR can cause photokeratitis or photo conjunctivitis (more commonly known as “snow blindness”) in the short-term. Continual UVR exposure, particularly exposure to UVB rays, may cause cataracts development, pterygium (a non-cancerous growth over the cornea) or skin cancer of the eyelids. | ||
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