Details: Fits & Measurements: Optical Fit: 52-21-145 Frame Width: 136 mm (5.4 in) Temple Length: 145 mm (5.7 in) Eye Size: 51.5 mm (2.0 in) Nose Bridge: 21.5 mm (0.8 in) B Measurement: 42.3 mm (1.7 in) The Lens Tortoise: No Correction Polarized lenses feature an amber gradient lens and Corrective (Reading, Bifocal, Progressive) lenses feature a solid amber lens. Warm Gray: No Correction Polarized lenses feature an amber gradient lens and Corrective (Reading, Bifocal) lenses feature a solid amber lens. The No Correction Lenses are polarized to reduce glare while enhancing color, depth and clarity The reading lenses are 2-in-1. Your favorite readers and sunglasses paired together Crafted for Comfort with lightweight frames and spring hinges UV400 Protection blocks 99.9% of UVA/UVB rays Dual Anti-Scratch Coating for long-lasting protection The Frame & ExtrasThe Frame Spring Hinges for a durable, comfortable fit Polycarbonate frame that’s super-strong and ultra-lightweight. The Extras Complimentary Case