Barton Perreira Norton Optical Frame combines refined round styling with a keyhole bridge for a balanced, everyday look. The Matte Dusk grey finish and lightweight acetate construction make it suitable for prescription or clear-lens wear. Key attributes: Matte Dusk | Gray | Acetate | Lightweight | Durable frame | Compatible with prescription lenses | Includes case and cleaning cloth | Round frame | Full rim (encircled) | Keyhole bridge | Matte dusk finish | Dimensions & fit: Lens width: 50 mm | Bridge: 21 mm | Temple length: 153 mm | Weight: 24 g | Medium size (50-21) | Composition & care: Acetate | Clean with the supplied microfiber cloth and store in the included case. Avoid exposure to high heat and harsh chemicals. Have adjustments performed by a professional.