What is cellulose acetate?
Cellulose acetate refers to a thermoplastic resin obtained by esterification with acetic acid as a solvent and acetic anhydride as an acetylating agent under the action o...
1.Wearing glasses can correct your vision
Myopia is caused by the fact that the distant light cannot be focused on the retina, causing distant objects to be unclear. However, by wearing a myopic le...
When discussing the question of whether sunglasses are better polarized or unpolarized, we first need to clarify the core differences between the two and their applicability in different scenarios....
1. Nose pads
Different from adults, children’s heads, especially the angle of the nose peak and the curvature of the bridge of the nose, have more obvious differences. Most children have...
How about the ranking of glasses?
In the discussion of “How does the optical industry rank?” When it comes to this topic, we have to go deep into multiple dimensions of the glasses indu...
TR-90 (plastic titanium) is a kind of polymer material with memory. It is the most popular ultra-light spectacle frame material in the world. It has the characteristics of super toughness, impact r...
