In the northern hemisphere summer, the sun direct light much more strongly than in winter, the sunlight affects everyone's field of vision, especially before and after the noon sun hot, everyone will wear sunglasses when walking or cycling.
Some people think that the deeper the color sunglasses can protect eyes, originally, this kind of idea is fault.
Lens color too deep will seriously affect the visibility, the eyes look for demanding brief damage, therefore, dark sunglasses can protect the eyes.
Sunglasses factory ms YC9707 sunglasses C8 hawksbill/dazzle colour yellow expert proposal, summer choice is: the lens should be able to through the 30% of visible light, gray and green, for the best, so, not only can resist ultraviolet light, and sharpness of vision, the best perspective outside the color change of a body is smallest.
The choose and buy sunglasses should pay attention to the following aspects: drop the small brand is often neglected.
In fact, the tags on the producers, in addition to tell you glasses also hide a lot of useful information, such as whether you choose and buy glasses sunglasses is still light mirror, resin lens is Alexander.
Ray-ban sunglasses RB3449 men silver/lens dazzle colour blue 004/55 lens to distinguish the lens quality is one of the most brief method, is to take glasses in rocking back and forth in front of him, to see if the object and the lens to move together.
If is that the lens is not flat, concave and convex, belongs to the unqualified lenses.
Of course this is for flat lens, if be myopia sunglasses that are not quite sure.
Ray-ban RB4242 unisex eyeglass frame 6201/13 brown color in addition to leisure and entertainment, if is really for uv protection, is still the best buy ray-ban grey, ray-ban green, blue gray real sunshade lens sunglasses, because these relatively soothing colors, and looking at nature does not change color, is especially suitable for motorists, because will not affect their distinguish of traffic lights and traffic signal.
The UV index for sunglasses, UV index also is to filter out ultraviolet rays, it is important to a standard, the current most sunglasses UV index at 96% -
98%, dark lenses must be better than light lenses.
Typically 100% of the UV index is unlikely, if have manufacturers claim to own the sun glasses have one hundred percent filter ultraviolet effect, that his cow can have bit of inflating.
related: sun glasses sunglasses