While it is true that designer sunglasses are usually worn as an accessory, due to the fact that they are also used as protection for the eyes, one should not but sunglasses simply because they look nice. In the world of product design and marketing, there are certain standards before an item can be distributed in the market for sales.
When it comes to sunglasses, there are three major standards mostly pertaining to their degree of protection from UV radiation but also includes other requirements. A worldwide standard or ISO does not currently exist, however in the year 2004 an ISO committee was formed for sunglasses covering technology, development etc…
Normally these standards are not compulsory and it is up to the manufacturers to comply.
In Australia the standard or AS/NZ 1067:2003 have five ratings all pertaining to the quality of product and most importantly effectivity in blocking out the sun’s harmful rays. The standards set in Australia are quite similar to European standards, thus opening the European market to sunglasses manufactured in Australia.
You will often see the CE mark on an item that has met the European set of standards. A 0 means insufficient UV protection, A 2 means sufficient protection and a 7 is full UHVV protection or that 5% or less of the harmful rays actually get through the lenses.
The us standard is marked as ANSI which includes three categories of transmittance. One being that the transference of UVB rays should be no more than one per cent, the next being protection high impact, to test this a one inch steel ball is dropped from a height of 50 inches onto the lenses. There is also a high velocity test which entails a ¼ inch steel ball being shot at the lens at 150 feet per second. In order to pass the tests, the lens must not touch the eye at any part.
Designer sunglasses usually adhere to these standards, thus making them top of the line and worth every penny.
These are all Technical details. The bottom line is that when you purchase sunglasses, designer or otherwise you must make sure that one, you are receiving ample protection and two you look and feel great in them.
5. Louis Vuitton Evasion 
3. Moss Lipow- Price 3,800- Miss Lippow was never one to be traditional. When iot comes to eccentric eyewear, Moss Lippow is the master and this pair is no exception. Whoever heard of alligator and ostrich leather frames? Well, that is exactly what you get with these sunglasses. It us rumored that this pair was inspired by rock’n’roller Buddy Holly and a pair he often sported in the 50’s, once the most expensive in the world, years later, this pair still makes the list.
2. Luxuriator- Style 23, Price $65,000. Decadent, opulent, a piece of jewelry for your eyes, this is what these sunglasses are. 132 hand set pave diamonds, Ivory buffalo horn temples, a 16k golden frame with a 2 carat accent diamond. This pair of sunglasses boasts a 3.45 carat weight. Oooh. Sparkly.
1. Dolce and Gabbana- DG2027B, price $383,609. This pair comes in a slew of colors but the most popular are the brown ones, brown tinted lenses and ivory colored frames, the logo is set in the arms with diamonds.