49-51 of 51 results
PC Polarized Lens
- Sep 15, 2020
- Hits: 46
PC(Polycarbonate)is molecular chain containing carbonate base polymer, due to the particularity of Polycarbonate structure, has become the fastest growing in the top five engineering plastics of...
How to Choose Qualified Sunglasses
- Jul 18, 2019
- Hits: 50
The study found that nearly 30% of solar radiation will pass through the atmosphere, especially ultraviolet rays with wavelengths greater than 315 nm, which will cause the greatest damage to the eyes;...
Do Not Put Glasses in the Car at High Temperatures
- Jul 18, 2019
- Hits: 36
The temperature has started to rise in recent days, and the highest temperatures in some places have reached more than 40 °C. Topper remind you that sunglasses and myopia frames should not be placed...