1, edging, positioning with the central instrument, and selecting the correct flat edging method on the semi-automatic edging machine.

2. Polishing the safety angle. After edging, it is advisable to grind the outer side of the chamfer less to avoid scratching your hands, and grind the inner side more to prevent scratching your face when wearing it.

3. Polishing: Polishing the lens edge to be smooth and bright.

4. Slotting: Slotting the flat edges of the left and right lenses with a slotting machine.

5. Assembly, molding and testing after processing.