HOW TO PROTECT YOUR EYES FROM UV RAYS
Sunlight makes us happy – literally. When our skin is exposed to sunlight our body produces endorphins. It also stimulates the production of Vitamin D which is important for the health of our teeth, muscles, bones and immune system.
But where there is light, there is also shadow… Most likely you have known for a long time that besides all its good properties sunlight also harbours risks. Its ultraviolet radiation is not only dangerous for our skin but can cause lasting damage to our eyes.
Did you know that the intensity of UV rays depends on several factors?
- GEOGRAPHIC LOCATION
Along the equator UV radiation is at its most intense.
For every 1,000 metre increase in altitude the intensity of UV levels increases up to 20 percent.
- TIME OF THE DAY
The sun is at its highest at noon - depending on the season this can vary between 10 a.m. and 2 p.m. UV rays are also their most intense at this time.
- ENVIRONMENTAL SETTING
In wide open spaces, especially those covered with snow or sand,UV exposure is more intense than in urban settings where tall buildings shade the streets. In fact UV exposure can nearly double when UV rays are reflected from the snow.
Cloud cover does not significantly affect UV levels. The risk of UV exposure can be quite high even on hazy or overcast days. This is because UV is invisible radiation, not visible light, and can penetrate clouds.
Certain medications can increase the body's sensitivity to UV radiation. The accompanying medication leaflet usually provides information about this.
The appropriate sun screen for your skin as well as high-quality sunglasses with a maximum UV protection will help you to fully enjoy the sunlight without regrets. Accordingly, sunglasses should have a tint level (category = cat) 2 or 3. The tint category is usually noted on a sticker or label on the inside of the temple. In extreme radiation conditions, such as on snow in the high mountains, you should wear category 4 sunglasses.
Now go out and enjoy the sunny time well protected!