2 ALL RIGHTS RESERVED © LAB MOD SYSTEM FRAME PARTS LAB CONSUMABLES TOOLS PLIERS EQUIPMENTS LENSES REFRACTION & ORTHOPTIC INDEX Bases Base 2 Suitable for the world of fashion frames with straight fronts. Base 4 Much used for trendy and latest generation sunglasses. Available in many variations according to specific needs. Base 6 For sunglasses with classic sun lenses. Available in different variants according to specific needs. Base 8 Suitable for sport and wrap around sunglasses. Base 8 lenses are more curved to ensure a greater wrapping of the sunglasses, to protect more of the eyes and increase the visual field of the wearer. The optical centre is decentred from the geometrical axis to ensure a clear and better vision even in lateral areas. LENSES 6.0 B 2 B 4 B 6 B 8 The base of a lens is the curvature of the lens itself. The higher the value of the base, the more the lens is curved and the glasses wrap around the face. It Is important to know this data when choosing a lens to mount on a frame. It is necessary to select the lens with the most suitable base according to the curve of the bevel of the eyepiece. α = 15° α =Wrap around inclination