Yesterday a customer asked if the lenses are UV-protected? I answered UV-protected, almost all lenses are UV-protected (90% of the products on the market are resin lenses). The customer is right, the glass is UV resistant. I answered that not all glass is UV resistant. The customer didn't believe it. In order to prove what he said, he took out the UV pen light (360nm) in the store to test the counter glass in the store, and found that it was not UV-proof. Customers still don't believe it and say that's not the case.