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Lens Materials Found On Sunglasses
Did you know that there are multiple types of lens materials used on glasses of all types? Most people would give you a blank stare if asked about some of the names below. It's true; glass isn't the only stuff in town. In this article I will go over the most common materials used to make lenses, as well as the advantages each one offers. Who knows, you may just drop your current pair of shades in favor of something else. Glass - Optical quality glass is free of distortion causing objects such as bubbles and/or seeds that plague other types of glass. Because of this, optical glass makes the clearest lenses available anywhere. While optical quality glass lenses may be heavier than plastic lenses, they are much more prone to survive heat damage. Also of interest is the fact that glass is much more scratch resistant than either of the two lens materials listed below. CR-39 - Probably the best optical quality plastic, CR-39 is made from hard resin and is highly impact resistant -- Much more than glass. If you need something extra light, CR-39 saves the day too; it weighs half as much as glass. Polycarbonate - Polycarbonate is the strongest of all optical quality lens materials. Most often, you will see safety glasses, ballistics glasses, and high impact glasses being made from polycarbonate. Lenses made from polycarbonate are also the lightest -- three times lighter than glass. Not everything is rosy though; polycarbonate lenses scratch easily, and must be hard coated to meet the scratch resistance that CR-39 plastic offers. So which material is right for you? Most of the time, the type of lens you choose is a matter of comfort. If you need something light and strong, the obvious choice is either CR-39 or polycarbonate. If the ultimate in scratch resistance is what you are after, then get glass. Either way, by properly educating yourself about the various advantages and disadvantages each material has, you can make an informed decision as to what you really need. ***************************************************
Latest News:Site: Yahoo! News Search Results for news Myanmar's Suu Kyi to get family letters, news mags (Reuters via Yahoo! News) Detained Myanmar opposition leader Aung San Suu Kyi has managed to wring small concessions from the ruling generals in the form of letters from her family and some international news magazines, her lawyer said on Friday. JCDecaux in talks for News Outdoor Group in Russia (AP via Yahoo! News) French outdoor advertising firm JCDecaux SA said Thursday it is negotiating to buy Russian rival News Outdoor Group from global media company News Corp. News Corp tightens grip on Premiere with new CEO (Reuters via Yahoo! News) Rupert Murdoch tightened his grip on German pay-TV broadcaster Premiere by appointing News Corp executive Mark Williams as CEO in a move to get the company back on track. SEC Looks Into UAL Stock Scare; Implications For Online News? (CBS News) A ton of digits have been devoted to this in other spots but the SEC's decision to investigate takes it to another level. The backstory: a six-year-old news story about UAL declaring bankruptcy made it into the Tribune-owned Sun-Sentinel 's current news flow, was picked up by a Google (NSDQ: GOOG) News bot and, via a reporter for a newsletter, made it onto Bloomberg News. After a lot of buck ... JCDecaux and News Corp. in talks to combine outdoor ad groups (International Herald Tribune) The News Corp. chief executive, Rupert Murdoch, has recently expressed nervousness about investments in Russia, where News Outdoor generated the bulk of its revenue last year. SEC Looks Into UAL Stock Scare; Implications For Online News? (paidContent.org via Yahoo! Finance) A ton of digits have been devoted to this in other spots but the SEC's decision to investigate takes it to another level. The backstory: a six-year-old news story about UAL declaring bankruptcy made it into the Tribune-owned Sun-Sentinel's current news flow, was picked up by a Google News bot and, via a reporter for a newsletter, made it onto Bloomberg News. JCDecaux in talks to buy News Corp. billboard unit (AP via Yahoo! Finance) In a deal that would create the world's largest outdoor advertising company, French conglomerate JCDecaux SA said Thursday that it is in talks to buy Russian rival News Outdoor Group from global media company News Corp. Phila. mayor to announce grim budget news (The Philadelphia Inquirer) The Nutter administration is expected to announce grim budget news today, which is all but certain to lead to significant spending cuts - perhaps as high as 10 percent - in some city departments, according to three sources familiar with the budget. News Corp says Mark Williams interim Premiere CEO (Reuters via Yahoo! News) News Corp. executive Mark Williams has taken over as chief executive of German pay-TV broadcaster Premiere in an interim capacity, News Corp. said after the move led to renewed takeover speculation. DIVA TALK: Chatting with In the Heights ' Mandy Gonzalez Plus News of Fraser, Testa and Bundy (Playbill) News, views and reviews about the multi-talented women of the musical theatre and the concert/cabaret stage. Site: news - Google News Palm Shares Soar As New Smartphone Wins Wall Street Praise - CNNMoney.com
MORE RESOURCES: Site: Yahoo! News Search Results for beauty Documentary on beauty hits Napa; local couple get their message out (Napa Valley Register) Is America obsessed with beauty? It?s a question a Napa couple have helped answer in a highly-decorated documentary film about to play in Napa. Fashion Beauty Music (Scoop.co.nz) Drawing only the best crowds, providing a party atmosphere like no otherand always raising the bar, FASHION BEAUTY MUSIC has established itself asa premium high profile event with a reputation of quality. First Beauty Contest for Hybrid Falcons to be Held in Capital (Khaleej Times) abu dhabi ? The International Hunting and Equestrian Exhibition ? Abu Dhabi 2008 ? will host the first beauty contest for hybrid falcons, organisers of the event said on Thursday. Beauty from the inside out, outside in (Midland Daily News) They were already, all of them, beautiful young women. But on the stage at Coleman High School early Saturday afternoon, they positively glowed with a new awareness of the unique beauty each possessed. From the audience, cheers, whistles and applause confirmed their newly heightened confidence. FALLING FOR FALL BEAUTY TRENDS (Las Vegas Review-Journal) The fall runways were good to the beauty industry. Rather than send out looks that let the clothes do all the talking, designers collaborated with beauty artists to capture a complete vision. Audience members didn't know which to glue their eyes to, the garments or the hair and makeup. Flaming Gorge: Beauty and variety (The Salt Lake Tribune) Flaming Gorge National Recreation Area - A guy like Emmett Heath, who has spent much of his adult life hanging around Flaming Gorge Reservoir and the Green River, might be excused if he took the area's beauty and wildlife for granted. Real beauty at Palace (Redditch Standard) HIGHLY acclaimed European Ballet presents classic and enchanting ballet Sleeping Beauty at Redditch's Palace Theatre this Sunday (September 14, 5.30pm). Robber strikes beauty supply store in Merced (Merced Sun-Star) Merced police are on the lookout for a man who committed a robbery at Sally's Beauty Supply store on Tuesday. Beauty Therapist (Maternity cover) (World Leisure News) Nuffield Proactive Health has a great opportunity for a Beauty Therapist to work within one of Europe?s largest corporate Wellness facilities in Canary Wharf. This Corporate Club of the Year 2005 is 41,000 sq. ft in size and has a team of 24 members of staff. Delgado's late run a thing of beauty (MLB.com) Delgado's late run a thing of beauty Site: beauty - Google News OQO OLED Notebook Is A Luminous Beauty - Wired News
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