Metal material
Titanium alloy
Features: It has the advantages of light weight, high strength, corrosion resistance, not easy to deformation, and small irritation to the skin, suitable for long-term...
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...
In the discussion of “What is the optical refractive index of an eye lens?” When it comes to this problem, we first need to understand the physical concept of optical refractive index, ...
What is the difference between resin lens and pc lens, which is good?
Resin lens and PC lens as the two mainstream materials of modern eyeglass lenses, each has its own unique characteristics and a...
Wearing experience
Comfort: If the size of the sunglasses is too large, the glasses are easy to slide, frequent adjustment will bring a lot of inconvenience; If the size is too small, it will cause...
The color depth of sunglasses and eye protection ability is not a simple positive correlation, the following is the specific analysis:
Sun glasses color action principle
The color of sunglasses is ...
