Optical glass lenses are optical materials made from high-purity silicon, boron, sodium, and other oxides. They are mainly used for vision correction, sun protection, and eye protection. Optical glass has a high refractive index and high surface hardness, but it is heavy and fragile. With the development of resin lens technology, the use of glass lenses has decreased.
The choice of material for optical glasses depends on your usage scenario and needs. Currently, the mainstream materials are:
Resin lenses: Lightest and most impact-resistant, suitable for sports or children. Many refractive index options are available, but the surface is relatively soft, requiring a scratch-resistant coating. Avoid using alcohol to clean them, as it can damage the coating.
Glass lenses: Top-tier optical performance, the first choice for those with high myopia, offering high clarity and scratch resistance. The disadvantage is that they are heavy and brittle; if broken, they may injure the eyes. Fewer people use them now.
PC lenses: Strongest impact resistance, suitable for extreme sports or safety protection, but easily scratched, and their optical performance is slightly inferior.
Nylon lenses: Flexible and heat-resistant, commonly used in sports sunglasses, but the edges will thicken when the prescription is too high.
