How to choose eyeglass frames? What are the testing items and standards?

1.Classification of eyeglass frames

According to material properties, it can be classified into hybrid racks (metal plastic hybrid racks, plastic metal hybrid racks), metal racks, plastic racks, and natural organic material racks;
According to the framework structure classification, it can be divided into full frame, half frame, frameless, and folding frame.

2.How to choose eyeglass frames

You can start with the appearance and feel of the eyeglass frame. By observing the overall delicacy, smoothness, spring recovery, and flexibility of the mirror legs, the quality of the frame can be roughly judged. In addition, the quality of the frame can be comprehensively judged from details such as screw tightness, welding process, symmetry of the frame, and standardized size labeling.
When choosing a eyeglass frame, it is important to pay attention to the trial wearing process. Not only should the frame be aesthetically pleasing, but it should also meet the optical and metrological requirements, match the wearer's facial bone structure, ensure that all force points on the face are evenly supported and stable, and ensure that the lenses are always in a reasonable position for comfortable wearing.