Hummm! make eyes at the sun, see the sunny side of life! The sunglasses have the double advantage of being protective and aesthetic. But be careful all the glasses do not filter the light in the same way. You need to choose knowingly. How to recognize the different lenses? What does UV 400? Should we take 100% UV?
These are questions you should ask yourself before you go in the sun and reads the answers.
100% UV
We do not know enough, but the sun can burn eyes. It must therefore be protected effectively with glasses. It should not be confused with colored glass protective lenses, this is not necessarily the same thing! The best way to find yourself in the maze of sunglasses is to trust the various logos placed on the glasses. Thus, the term "UV 400" means that the lenses filter out UVB rays (which have a shorter wavelength than UVA. They think they are responsible for skin lesions) but not UVA rays (which have wavelength greater than UVB). Only glasses "100% UV" filter UVA and UVB and it is they that we must choose without hesitation. : mirrored
If the glasses have also been treated mirror, they reflect the light completely, thus providing maximum protection. On the aesthetic point of view, processing mirror does not please everyone, so some manufacturers have been subjected to this treatment the side glasses that do not show. On the other hand, you will also find some glasses on a small drawing that represents the sea, sun and mountains, next to the logo 100% UV simply means that you can use these glasses regardless of sunlight being safe to be well protected. Anything but blue
To be avoided unless: the tinted glasses in blue. The blue color is the worst in this area: the glasses are transparent to infra-red, and vision is distorted. Good to know
For the myopic who can not leave their eyeglasses, there is a system that allows the lenses to clip on protective glasses (opticians).
These are questions you should ask yourself before you go in the sun and reads the answers.
100% UV
We do not know enough, but the sun can burn eyes. It must therefore be protected effectively with glasses. It should not be confused with colored glass protective lenses, this is not necessarily the same thing! The best way to find yourself in the maze of sunglasses is to trust the various logos placed on the glasses. Thus, the term "UV 400" means that the lenses filter out UVB rays (which have a shorter wavelength than UVA. They think they are responsible for skin lesions) but not UVA rays (which have wavelength greater than UVB). Only glasses "100% UV" filter UVA and UVB and it is they that we must choose without hesitation. : mirrored
If the glasses have also been treated mirror, they reflect the light completely, thus providing maximum protection. On the aesthetic point of view, processing mirror does not please everyone, so some manufacturers have been subjected to this treatment the side glasses that do not show. On the other hand, you will also find some glasses on a small drawing that represents the sea, sun and mountains, next to the logo 100% UV simply means that you can use these glasses regardless of sunlight being safe to be well protected. Anything but blue
To be avoided unless: the tinted glasses in blue. The blue color is the worst in this area: the glasses are transparent to infra-red, and vision is distorted. Good to know
For the myopic who can not leave their eyeglasses, there is a system that allows the lenses to clip on protective glasses (opticians).
1 comments:
Hello
Im Brazilian you have nice blog
www.saiadesalto.blogspot.com
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