There are so many materials in the frame, which one do you choose?
As a part of the glasses, the frame not only plays the role of supporting the lens, but also is responsible for the face value of a pair of glasses. Choosing a comfortable frame that fits the skin is even more important for many people than choosing a lens. If the frame is not good, it will be easy to get dizzy when wearing it, and the eyes will be uncomfortable. So, do you know which materials are in the frame? What are the characteristics of these materials?