Our Prescription Rx-able frames are especially made so that you can replace your Rx prescription lenses in these frames but only with the help of your Local Optometrist. Free Hard Carrying Case Included with micro fiber cleaning cloth to help protect your glasses from dirt, fingerprints and from breaking. Save money by buying our frames and taking them to your optician. You will notice that our frames are made of the same high quality zyl acetate materials and stainless steel as the leading brands at all Eye Vision Offices around the United States. Look and feel great with our trendy styles and lightweight prescription glasses frames.Eye: 54 MM X Bridge:17 MM X Arm Length:142 MM Vertical B: 36.5 MM. Superior Material: High Quality ZYL Acetate. Rx-Compatible: Specially tooled lens grooves of this frame allow the user to replace stock lenses with prescription lenses from his or her optician. Accessories: Hard carrying case and micro cleaning cloth included. Color: Black