1) Material: 1.523 mineral glass 2) Round Shape / Flat Top bifocal lenses 3) Color: White, Photo brown, Photo grey 4) Diameter/Segment: 65/28mm 5) Finished Lenses Power: Sph: -2.00 to +3.00, Add +1.00 to +3.00 6) Uncoated, Multi-coated(AR), AR&EMI treatment available in greenish and bluish color 7) Semi finished Lenses: Base Curve: 200, 400, 600, 800 Skype: clearoptical