Try on the KX (4540) DEMO at your local EyeCare Associates location. These blue designer eyeglasses from Silhouette are perfect for focusing at work or relaxing at home. Made from metal, these eyeglasses feature a design and can help you see clearly with prescription lenses. At EyeCare Associates, we can build a complete pair of Silhouette KX (4540) DEMO just for you, with custom lenses designed for your vision needs.