Sunglasses are a very popular sort of accessory in these days. Most people would think that a pair of sunglasses is simply used to block out excessive sunlight. But in fact, there are different types of sunglasses, such as regular sunglasses, polarized sunglasses and prescription sunglasses. Designer sunglasses made by modern manufacturers can also offer wearers with fashionable designs and styles. It is easy for customers to find a pair of sunglasses that complements their personalities. This article introduces mainly polarized sunglasses and prescription sunglasses.
In general, polarized sunglasses are used in an environment with much sun glare. This is quite common when a person is in sunlight. Glare from sunlight always makes seeing difficult for the light can upset the eye and obscure details hidden behind it. Sunglasses equipped with polarized lenses can effectively filter out unwanted sun glare. It is widely known that car windshield tinting is utilized to shield a driver from the sunlight. Polarized sunglasses function in a similar way by incorporating a second protective layer which allows only vertical waves to pass through. In other words, polarized lenses can competently block out those horizontal waves which are the majority in sunlight. there are a lot of people with different occupations that can benefit from wearing polarized sunglasses, such as fishermen and boaters as well as those who are always in outside.
Another popular type is prescription sunglasses. This particular kind is suggested by the name to meet the requirements both for vision aid and sunlight filtering. When it comes to the function of UV protection, prescription sunglasses have no significant difference from regular sunglasses. Nearly all lens materials can be used, such as high index of polycarbonate, Trivex, regular plastic and glass. Moreover, lighter and cheaper materials are more commonly used. When it comes to the function of vision correction, prescription sunglasses are as competent as regular prescription eyeglasses. However, prescription sunglasses as a combination kind of product are more convenient than carrying regular prescription glasses as well as clip ons.