Suitable decentred lens
• choose the right lens depending on wrap frame angle (WFA).

Alignment
• align the lens with the square tag to Nasal;
• the 0-180 axis of the lens should align with the 0-180 axis of the frame;
• do NOT rotate the lens in the frame.

Horizontal Placement
• fit the Geometrical centre horizontally at the pupil centre;
• for low WFA you can shift the lens horizontally toward the nasal side;
• for high WFA you can shift the lens horizontally toward the temporal side.

Vertical Placement
• position the lens vertically with the Geometrical centre or 0-180 axis at a typical pupil height for the frame.

Polarization: edging & glazing

Alignment
• align the 0-180 axis of the lens with the 1-180 axis of the frame;
• for decentered lenses align the lens with the biggest tag to Nasal;
• do NOT rotate the lens in the frame.

Bevel
• try to keep the bevel in the center of the edge of the lens;
• avoid negative bevel (permitted on Injected Pol. PC);
• avoid stress to the lens with smooth or inappropriate cutters;
• use a convenient cutter speed rotation and feed motion.

Checking
• use a polarizer for the determination of the axis of polarization;
• the axis of the lenses should be aligned with the horizontal axis of the oculars