1, when the plate and tr90 frame need to be greatly adjusted, you can use a household hair dryer to blow the heat first.

2, metal frame, heating step can be omitted.

3. The frames made of special materials are difficult to adjust, and need to be heated with hot water or slowly heated with hot air, and then it is best to adjust them directly by hand.

4. When adjusting rimless half-frame glasses, it is necessary to clamp some parts of the glasses with the help of auxiliary tools to control the stress state of the lenses, or adjust them after removing the lenses.