What do you think are the categories of lenses by material? What are its characteristics?

Generally speaking, the lens material of sunglasses can be divided into three main categories - glass lenses, resin lenses, PC lenses. Glass lenses are the best optical material, but because ordinary glass lenses are easier to break, the safety performance is not high for people who love outdoor sports, so they are basically not used in sunglasses. In addition to ordinary glass lenses, there are high-end reinforced glass polarized lenses, which are anti-explosion and anti-flowering, and perfectly protect against ultraviolet rays and glare, but the price of such sunglasses is not acceptable to the general public. Nowadays, the most commonly used lenses for sunglasses are resin lenses, resin is a kind of phenolic structure of chemical substances, which is characterized by very light, high temperature resistance,, impact resistance, and can effectively block ultraviolet rays. It should be said that this is a better material for sunglasses lenses, and polarized lenses made from this material will make us see things more clearly. There is another kind of sunglasses lenses called PC lenses on the market, which is quite excellent in terms of impact resistance and not easy to break, and it is a kind of material suitable for making sporty sunglasses lenses. It should be said that the performance of PC lenses is better than that of resin lenses, but of course their price is higher.