Consumers should pay attention to the following points when choosing Cheap ray ban wayfarer sunglasses
1, first of all to know the purpose of the purchase of sunglasses, we know that different types of sunglasses have their different application occasions and people.We want to buy Sunglasses first of all to determine the purpose of their purchase is for the sun, or for the decoration of the role? In addition to the sun outside whether there are anti UV functional requirements? Are there any special requirements for the safety of the lens? Only clear these purposes, and then combined with the style and the actual effect of wearing the face, to buy a suitable pair of sunglasses.
2, to learn to read product identification: not all sunglasses have anti UV function, a pair of sunglasses to meet the basic requirements of the standard, Can only say that in blocking the light at the same time without more uv. If a pair of sunglasses would block the glare of prevented the same amount of ultra violet light, for the wearer will accept than not wearing sunglasses more ultraviolet light (wear sunglasses will reduce into eyes flux, resulting in wearers pupil increases). In store counter sales of sunglasses, the lens, the tag or the outer packing generally have obvious uv380, UV400 and other similar signs, like in the clothing with the fabric composition marked as, consumers purchase must carefully check.
3, to have the basic skills of the intrinsic quality of the lens to identify: (1) the degree of lens should meet the requirements of Plano lenses and should not affect the eyesight of optical defects. Simple identification methods, it can be placed in front of sunglasses, through the lens observe distant targets, such as window frames or door frames, etc., then the glasses up and down before and after the move, the goal should not sway and wave shaped deformation. (2) the color of the lens can not be partial, should make the color of the surrounding environment is not distorted, the edge of the object clearly has the ability to effectively identify the different colors of light. The choice of the color depth of the lens, because of the place where the required activities, for different light sources and occasions, the color of the lens will affect the shading effect. To make the sunglasses can effectively shield the summer light, the color of the glasses because there is enough depth, but the bike or car, do not choose the color of the lens is too deep.