Perhaps only part of people know the fact: not only do the UV rays do harm to our skin, but they also lead to accumulative damage to eyes. Being exposed to the sun for a long time may cause negative effects such as cataracts, snow blindness, and skin cancer. Even a short time exposed to sun may burn the front surface of your eye lens. Sunglasses are a form of protective eyewear that can prevent nearly 100 percent of UVA and UVB radiation from discomforting the eyes. Here are some important features of sunglasses .
Best features of sunglasses:
Comfort: A good look is not the only essential of wearing sunglasses. Protecting your eyes from blocking out harmful UV rays is also indispensable. A befitting pair of sunglasses can wellfiton your head without bringing any discomfort. The center of the lens and the center of your eyes should be in a straight level line, and make sure the frames are in appropriate width without allowing the UV rays to damage your eyes from the sides.
Structure: You can find severalselections of sunglasses practicable in many styles, like the more popular aviator, wayfarer, cat eye, and wraparound. In fact, the shape you choose represents your view of aesthetics. Finding a suitable shape for your face shape seems great. Moreover, the design of the shapes is also applied to eye protection, like athletic sunglasses, which have a slight figure but wrap your eyes well , make you comfortable and prevent UV rays from all angles.
Function:UV protection is one of the best known features of the sunglasses, and try to search for the sunglasses with perfect UV protection when you are shopping. Also, if you want your sunglasses to be more protective, seek for the lens with polarized and anti-reflective function.
Stuff: Although most sunglasses consist of plastic, particularly the lenses, each type of plastic plays a different role. Stronger plastic seems to be safer for eyes and more durable. Polycarbonate is both solid and light, also it is always applied to lenses and frames. CR-39 is best known for high quality and smash resistance in lense materials.
Hue:Each lens tint takes on its specific function of light filtration. Grey-tinted lenses are best for driving since they can lessen the shiny light without color distortion. Amber and brown lenses also lessen blue light and glare. Gradient lenses usually go from a darker shade at the top to a lighter one at the bottom, and they prevent sunlight from above and keep you in good sight like your car’ s windshield.