Tom Ford Blue Block Navigator Optical combines an ultra-slim navigator silhouette with ready-to-wear blue-block lenses for everyday screen protection and refined styling. Key attributes: Dark Havana | Acetate | Blue-block lens protection | Ready-to-wear blue-block lenses | Lenses removable to fit prescription by an eye care professional | Includes protective case and cleaning cloth | Navigator / aviator shape | Full-rim frame | Shiny metal T logo on front | Ultra-slim acetate construction | Dimensions & fit: Lens width: 57 mm | Bridge: 13 mm | Temple length: 140 mm | Size: 57-13-140 | Composition & care: Acetate | Clean with a soft, dry cloth and store in the supplied case; have prescription lenses fitted by an eye care professional.