The RX201 features DuraLite frame technology for comfort and durabilty. SoftGrip nosepiece for enhanced comfort and grip during lengthy procedures. Extended temple bar for a natural, contoured fit. ProLiteHT Lenses utilize exclusive SF6HT leaded glass for up to 20% more light transmission. Lateral Protection: 0.50 mm (+/- .01) Pb extrusion. Lead Equivalent Lens: 0.62 mm (0.50 mm (+/- .01) Pb glass. Weight: 2.1 oz.
Combined sphere and cylinder range allowed on this frame: +2.0 to -3.5