Bifocal sunglasses, shades with multiply powered lenses, are the latest effort from the relentlessly innovative optical industry, whose endless endeavor in bringing the eyewear wearing experience onto another level have benefited millions upon millions vision error sufferers around the globe. The pace with which those gadgets evolve is purely fascinating. Years ago when the introduction of prescription sunglasses into the public arena brought about a revolution and reshaped the landscape of the optical industry, people thought those optical guys have definitely done all they could. Now, when prescription sunglasses have become as plain as prescription spectacles, people begin to wonder what the next big thing in the optical world will be. Well, if you have paid any attention to the industry at all, you will have full confidence in claiming that bifocal sunglasses will take that crown and be adored by lots and lots of spectacles and shades wearers in the foreseeable future.
source: http://www.firmoo.com