Buy Sunglasses with complete logos and try to choose Sunglasses with polarized lenses. The primary function of the polarizer’s Sunglasses (that is, polarized sunglasses) is to prevent ultraviolet and filter polarized light. A good polarizing sunglass lens can block more than 99% ultraviolet rays, and consumers can choose a polarizing sunglass with a “UV400” protection logo.
The choice of polarized sunglasses should be true and natural. The color selection of the polarizing lenses should be based on the color of the surrounding environment, the clear edge of the object, and the effective recognition of the different color traffic lights. The color of the lens is good in gray, tea and green, because the lenses of these colors are good for infrared and ultraviolet absorption, and can improve visual contrast and clarity, especially as driving sunglasses, to ensure driving safety. The choice of sunglasses color, it is suggested that before wearing sunglasses, first observe the red, green, yellow and other colors, and then wear sunglasses, observe the same object, the color of the two observation can not have a large color difference, otherwise it will reduce the ability to identify traffic lights. Special attention should be paid to the identification of sunglasses with colorful lenses, especially those with bright colors, such as orange, green and blue lenses on the front.
When choosing sunglasses, first check the quality of the lenses to see whether the surface of the lenses is smooth, there are warpage, wear marks, bubbles. Lens warping can cause light deviation, uneven or bubble, dizziness, blurred vision and other discomforts. Also note that lenses should not be too thin, otherwise high temperature deformation will also cause dizziness. At the same time, the thickness of the lens determines the cost of the lens. In general, the thicker the lens is, the higher the cost, the better the quality, the higher the impact strength and the security of the lens. You can get your sunglasses 30-50 centimeters away from your eyes and watch the vertical and horizontal lines around them, such as window frames or doorframes, and then move the glasses up and down. If the straight line is distorted or wobbled, it is indicated that the lenses are of large radian or degree, and should not be purchased. On the market, partial light sunglasses, some products use the thickness of 0.7mm resin polarizing lens, because the lens thin, in the assembly is easy to produce deformation, should be paid special attention when choosing. It is found that the thickness of some lenses is only 0.3 mm, and there is a certain potential safety hazard, it is recommended not to buy.