1. Protecting Yourself from UV Radiation
SUN SAFETY
Protecting Yourself from UV Radiation
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2. Ultraviolet Radiation - UV
What is Ultraviolet Radiation?
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3. Ultraviolet Radiation - UV
The sun is the energy source that sustains all life on earth.
Ultraviolet Radiation (UV) is simply one form of energy coming from the sun.
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4. Ultraviolet Radiation - UV
Sunlight contains 3 types of UV rays…
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5. Ultraviolet Radiation - UV
UVA—causes skin aging & wrinkles. Used in tanning beds. Colors skin and gives false sense of protection from the sun. UVA rays pass effortlessly through the ozone layer.
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6. Ultraviolet Radiation - UV
UVB—causes sunburns, cataracts, immune system damage, skin cancer. Melanoma may be associated with severe UVB sunburns occurring before the age of 20. Most UVB rays are absorbed by the ozone layer.
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7. Ultraviolet Radiation - UV
UVC—these rays are the most dangerous. Fortunately, these rays are blocked by the ozone layer and don’t reach the earth.
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8. Ultraviolet Radiation - UV
Even on cloudy, cool, or overcast days, UV rays travel through the clouds and reflect off sand, water, snow, and even concrete.
Clouds and pollution don’t filter out UV rays, and can give a false sense of protection.
This “invisible sun” can cause unexpected sunburn and skin damage.
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9. Ultraviolet Radiation - UV
The sun’s light is strongest when it is highest in the sky (normally from 10 AM to 4 PM).
UV rays are strongest during the summer.
UV intensity is greater at high altitudes. Skiers need to take extra care.
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10. Ultraviolet Radiation - UV
The UV Index* predicts the next day’s UV levels on a scale.
*Developed by the National Weather Service and the EPA.
UV Index Number
Exposure Level
Minutes to Burn
0 to 2
Minimal 60
3 to 4
Low 45
5 to 6
Moderate 30
7 to 9
High 15
10+
Very high 10
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11. Effects of UV Exposure
Sunburn
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12. Effects of UV Exposure
Sunburn
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13. Effects of UV Exposure
Sunburn develops when the amount of UV exposure is greater than the protection your skin’s melanin can provide.
The lighter your skin, the less melanin it has to absorb UV and protect itself.
All skin, no matter the color, thickens and hardens with continued sun exposure, resulting in wrinkles later in life.
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14. Effects of UV Exposure
Eye Damage
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15. Effects of UV Exposure
Spending long hours in the sun with no eye protection may increase your chance of developing cataracts.
Even low amounts of sunlight can increase the risk of eye disorders.
UVB damage to the eyes is cumulative, so it is never too late to start protecting your eyes.
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16. Effects of UV Exposure
Skin Damage
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17. Effects of UV Exposure
There are about 1.3 million new cases of skin cancer in the U.S. each year, resulting in about 9,800 deaths.
Melanoma is one type of skin cancer. It is the most common cancer among women between the ages of 25 and 29.
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18. Effects of UV Exposure
Skin cancer is the most common of cancers and is largely preventable.
Increased outdoor leisure time, less clothing worn outdoors, and decreased ozone levels are partly to blame.
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19. Effects of UV Exposure
Compare the underside of your arm to the topside of your arm to see the effect of sun exposure on your skin.
“Sun damage” causes wrinkles, easy bruising, brown “liver” spots, and potentially, skin cancer.
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20. Effects of UV Exposure
Scientists believe sunburns can alter the body’s immune system for up to 24 hours after exposure to the sun.
Repeated overexposure to UV radiation can cause more damage to the body’s immune system, even in people with dark skin.
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21. Guidelines for Protection
Eye Protection
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22. Guidelines for Protection
Sunglasses offer excellent protection.
Make sure the lenses are designed to block out 95% of UV.
Polarizing lenses and mirror finishes reduce glare, but have little effect in blocking the absorption of UV rays.
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23. Guidelines for Protection
Tanning Protection
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24. Guidelines for Protection
Sunscreen doesn’t offer 100% protection.
SPF 30+ sunscreen blocks 96% of UV; SPF 15+ blocks out 93%.
In addition to sunscreen, wear a hat, sunglasses, more clothing, and seek shade.
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25. Guidelines for Protection
Using SPF 30+ instead of SPF 15+ does not mean you can safely double your time in the sun.
Apply sunscreen 20 minutes before going outside. Don’t rub it in—a light film should stay visible.
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26. Guidelines for Protection
Reapply sunscreen every 2 hours if you are swimming or sweating a lot.
Fragrances and moisturizers in sunscreen may cause allergic reaction; experiment with other brands if this is a problem.
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27. Guidelines for Protection
Protective Clothing
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28. Guidelines for Protection
Choose clothes that cover your arms, legs and neck to ensure proper protection.
You won’t get too hot or uncomfortable in lightweight fabrics like cotton, hemp or linen.
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29. Guidelines for Protection
Most cotton and cotton/polyester fabrics protect against 95% of UV, but are less effective if wet, faded, or aged.
Dark colors are better at absorbing UV than light colors.
If you choose to wear light colors, make sure the fabric is a tight weave, such as canvas.
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30. Guidelines for Protection
Appropriately designed clothing is great for protecting you from the sun.
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31. Sun Safety
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