Try on the FLEXON EINSTEIN 600 at your local The EyeDoctors Optometrists location. These black designer eyeglasses from Flexon 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 The EyeDoctors Optometrists, we can build a complete pair of Flexon FLEXON EINSTEIN 600 just for you, with custom lenses designed for your vision needs.