Amazon.com: FLEXON Eyeglasses 600 033 Gunmetal 54MM 。FLEXON has always remained true to its original philosophy—even while experiencing significant growth in recent years. By emphasizing innovation, originality, quality and value FLEXON has refined its vision to earn worldwide recognition. Contemporary optical design and unparalleled craftsmanship define FLEXON. FLEXON has made the ascent from humble beginnings to its present position: a worldwide leader in affordable luxury eyewear. FLEXON uses state-of-the-art materials to craft their signature eyewear frames: premium cellulose acetate, ultra-lightweight titanium, and color-rich stainless steel. FLEXON eyeglasses include demo lenses with FLEXON logo etched into the lens. These demo lenses are designed to imitate the real look of a prescription eyewear as close as possible to traditional prescription lenses. Demo lenses can’t be worn simply as a fashion statement. Upon receipt of the frame they must be replaced with real lenses by a local optical shop regardless of prescription strength even for a perfect vision. From the earliest design conversations, sophisticated eyewear brands such as FLEXON develops innovative designs that feature layers of depth through the finest materials in optical. This commitment to craftsmanship delivers unmatched quality and timeless style that transform glasses from purely functional to coveted pieces of fashion art.