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Sun glasses are eyeglasses with sounded or non-colored Their purpose is it to protect the eyes against unpleasant or harmful effects of the sunlight.
Sun glasses are a personal protection equipment in the sense of the EEC guideline 89/686/EWG.
The technical standard for sun glasses is the DIN EN 1836 of 1997. According to this standard sun glasses are divided into the following filter categories:
| Category: | Light transmission degree: | Description: |
| outside of the standard | 3% | extremely darken Gletscherbrille |
| 4 | 8% | very darkly sounded |
| 3 | 18% | darkly sounded |
| 2 | 43% | medium strong sounded |
| 1 | 80% | easily sounded |
| 0 | 100% | colorless or completely easily sounded |
Only sun glasses of the categories 0 to 3 are certified for the use in the public traffic.
Sun glasses, also standard, are not suitable for the direct sun observation or for the protection with weldings. For this special sun observation filters and schweisserbrillen are and/or - masks to use.
The glasses (mineral glass or easy Polyacryl) are dyed depending upon mode in the following colors: brown (classically), green, grey, blue, yellow etc. with the classical brown dye develop the smallest color distortions. Additionally silverings also running are possible. In addition there are the photo-tropical glasses in such a way specified, which can adapt to the brightness (UV portion).
Expensive mark sun glasses with high-quality and frameworks are in particular of the US firm the Bausch & Lomb (mark: Ray Ban), Porsche Design and license marks of well-known mode companies (Armani, Chanel etc.).
The most important European sun glass manufacturers are Safilo (Gucci, Emporio Armani, Giorgio Armani, Dior, Polo Ralph Lauren, Yves Saint Laurent, Burberry among other things) and Luxoticca (Chanel, Ray Ban for Europe, Donna Karan, Prada, Killer loop, Sergio Tacchini, Jil Sander, Persol, Versace among other things)
Unusual eyeglasses are the infinitely variable sun glasses on the basis of two against each other adjustable polarisation filters.
Sun glasses also frequently carried by humans those from going blind or other eye diseases to suffer, in order to cover or protect with small Sehresten and sensitive eyes against bright light their eyes. Well-known personalities such as Ray Charles or Heino made themselves the sun glasses thus their brand name.
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