Try on the CF (5540) DEMO at your local The EyeDoctors Optometrists location. These blue designer eyeglasses from Silhouette are perfect for focusing at work or relaxing at home. Made from titanium, these eyeglasses feature a design and can help you see clearly with prescription lenses. At The EyeDoctors Optometrists, we can build a complete pair of Silhouette CF (5540) DEMO just for you, with custom lenses designed for your vision needs.