Guide to Sunglasses

Sunglasses for Kids-The Necessity of Both Protection and Fashion: Why sunglasses for kids? Unlike all other parts of human body that can automatically repair or replace their damaged cells, the lens of the eye can’t. 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. So, we should do […]
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Three types of clip on sunglasses: Clip on sunglasses are quite special that they are placed over prescription eyeglasses in order to block the glare of the sunlight. Using sunglass clip ons, it is unnecessary to remove the eyeglasses. In fact, these clip on sunglasses come with on temples and attach to the frame of prescription glasses. Nowadays, this style of sunglasses is very popular among outdoor and sports enthusiasts.
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Transition lenses and sunglasses: Transition lenses can change its color according to surrounding light conditions. The company claims that Transition lenses can darken in bright conditions so that they can provide enough UV protection as well as sunglasses do. This advocated feature of Transition lenses actually attracts a large group of customers, because they think that separate sunglasses are needless.
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Tints for corrective lenses: Eyeglass lenses can be applied with many tints and shading options nowadays. This is an important aspect to consider when customers choose proper eyeglasses. Lens tints have mainly two different functions, changing the eyeglass look and adding extra optical properties to the lenses.
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Benefits of polarized sunglasses: Polarized sunglass lenses were first developed by Edwin Land in 1936. These special lenses have now been widely used to block out solar glare. 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. The former type is more common.
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The evolution of sunglasses: Sunglasses have undergone a long history and can be dated back to the 12th century. During the past decades, sunglasses have progressed a lot in terms of functionality and appearance. Most of these achievement or breakthroughs made in the sunwear industry were absolutely unimaginable by those forerunners.
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Materials and coatings of sunglass lenses: Currently, there is a huge variety of sunglass lens materials. Thanks to the advancements in the lens technology, different people can now choose lenses that cater individual needs. In general, sunglass lenses are made of either plastic or glass. Plastic lenses are lightweight and provide different tints.
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Sunglasses that block out harmful blue light: Associated with natural aging, oxidation process usually causes free radicals, which are harmful to body health including the eyes. The authors of Save Your Sight Dr. Michael and Marc Rose have pointed out that an imbalance between free radicals and antioxidants is the major contributor to various eye diseases. Free radicals are also closed associated with many other disabilities and diseases related with aging.
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Benefits from polarized sunglasses: Before the invention of polarized sunglass lenses, sunglasses were barely used to block out bright sunlight. Their styles were also quite simple. Those early sunglasses were equipped with crude frames and usually hand-held styles, which were quite different from sunglasses today.
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Ultraviolet radiation and sunglasses: Since UV Index has been developed, more and more people pay attention to the risk of sunburn and the damage of UV radiation. UV rays have been classified into five categories and their respective risk levels are low, moderate, high, very high and extreme. Long time exposure to sunshine is closed associated with eye disasters
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