A spherical lens is constructed from suface section cut from spherical surface.The constant surfaced curvature across all section of the lens surface.
Product range:
Classic: 5,6,8 D base 　　　　

Decentered: 6,8,9,10D base　　

Shields:4,6,7D base 　　　　　

Thickness:1.7mm,2.0mm,2.3mm,2.5mm

Technical drawing