Wednesday, January 19, 2011

SUN: BEWARE THE EYES!

Much is said about the evils of sun on skin, but little of the danger of UV on the eyes. So all year, and more so in summer, do not forget your sunglasses, and do not choose any which!

The eyes either do not mix with UV!

If left unchecked, the ultraviolet rays can damage eyes. And in general, prolonged exposure leads to an increased risk of conjunctivitis, ophthalmia, cataracts early edema, diseases of the cornea? The only solution to protect their eyes from the sun as it protects his skin.

Especially no glasses gadgets!

The choice of filter glasses is essential. There is nothing worse for eyes than be falsely protected. This is precisely the case of glasses gadgets: the glasses are tinted, so the pupil dilates, but since they do not filter enough, if at all, the UV reaching the brunt of the retina. Attention, such glasses are often offered to children. These are just toys! A good pair of sunglasses comes not from its color but its filtering function. There are 5 clues filtration (0-4) and the lenses must be marked "CE" or "NF". Some can filter up to 100% of UV . Also note that there are now treatments that can filter out UVA and UVB. It is advisable to avoid small glasses and choose wraparound frames that protect property on the sides. Beware of photochromic lenses that provide comfort but are not adapted to extreme conditions like those found in the sea or mountains. And lentils? They effectively protect from UV and glare but only protect the core.The white of the eye remains exposed while also posing a risk of burns. The other way to protect yourself is to wear a wide brimmed hat or cap.

Who are the weakest?

Children Immature, their eyes let pass more UV . At 13 years, for example, 60% of UVA rays reach the retina even up to 50% of UVB. Not until 25 years that the lens begins to effectively stop. After 50 years Since the fifties, the eyes become more fragile and often solar capital of the eye is well underway.But some visual disturbances even more fragile and require eyes to strengthen precautions. Including cataract, promoting the glare, the lenses requires more filtering. The related macular degeneration (AMD) is a disorder of the retina that also requires a very good UV filter. Other retinal diseases of genetic origin and impose the same requirements (retinitis pigmentosa, albinism?).

Outside workers and drivers The first are constantly exposed and need to protect themselves as much as possible. The second risk of glare, which, in addition, can cause accidents. Holidaymakers in the mountains to the sea more one rises in altitude, more UV radiation increases, let alone thinking about snow. Without adequate protection, the risk of burns of the cornea are real. At sea, the sand and water reflect UV and exacerbate the danger. But every year, wearing sunglasses is beneficial. In town, they avoid the glare, especially when the sun's rays reflect off the white walls or buildings of glass, when you walk into the sun, while driving, etc..

 

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