Long time exposure to sunshine is closed associated with eye disasters More.Buy one pair of glasses at Smart Buy Glasses and get the second for free. UV rays have been classified into five categories and their respective risk levels are low, moderate, high, very high and extreme. Since UV Index has been developed, more and more people pay attention to the risk of sunburn and the damage of UV radiation. Those early sunglasses were equipped with crude frames and usually hand-held styles, which were quite different from sunglasses today. More.īefore the invention of polarized sunglass lenses, sunglasses were barely used to block out bright sunlight.
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Free radicals are also closed associated with many other disabilities and diseases related with aging. Michael and Marc Rose have pointed out that an imbalance between free radicals and antioxidants is the major contributor to various eye diseases. Sunglasses that block out harmful blue lightĪssociated with natural aging, oxidation process usually causes free radicals, which are harmful to body health including the eyes. Plastic lenses are lightweight and provide different tints. In general, sunglass lenses are made of either plastic or glass. Thanks to the advancements in the lens technology, different people can now choose lenses that cater individual needs. Materials and coatings of sunglass lensesĬurrently, there is a huge variety of sunglass lens materials. Most of these achievement or breakthroughs made in the sunwear industry were absolutely unimaginable by those forerunners. During the past decades, sunglasses have progressed a lot in terms of functionality and appearance. Sunglasses have undergone a long history and can be dated back to the 12th century. Present now, polarized eyeglasses come in mainly two types: one is coated with a protective substance and the other has a filter enclosed within it. These special lenses have now been widely used to block out solar glare. Polarized sunglass lenses were first developed by Edwin Land in 1936. Lens tints have mainly two different functions, changing the eyeglass look and adding extra optical properties to the lenses. This is an important aspect to consider when customers choose proper eyeglasses.
More.Įyeglass lenses can be applied with many tints and shading options nowadays. This advocated feature of Transition lenses actually attracts a large group of customers, because they think that separate sunglasses are needless. The company claims that Transition lenses can darken in bright conditions so that they can provide enough UV protection as well as sunglasses do. Transition lenses can change its color according to surrounding light conditions.
Nowadays, this style of sunglasses is very popular among outdoor and sports enthusiasts. In fact, these clip on sunglasses come with on temples and attach to the frame of prescription glasses. Using sunglass clip ons, it is unnecessary to remove the eyeglasses. So, we should do our More.Ĭlip on sunglasses are quite special that they are placed over prescription eyeglasses in order to block the glare of the sunlight.
Once the eyes are damaged or damage to the eyes accumulates day by day, we can do nothing to make our eyes replenished and rehabilitated. Unlike all other parts of human body that can automatically repair or replace their damaged cells, the lens of the eye can’t. Sunglasses for Kids-The Necessity of Both Protection and Fashion
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