Lenses are made from a variety of materials, the most common being mineral glass and plastic. We generally recommend plastic because it is lighter and more shatterproof than mineral glass. Both plastic and glass lenses can vary in optical design (single vision, bifocal and progressive).
The advantages of mineral glass (or ordinary glass) are resistance to scratching and a thinner result at high strengths when glass with a high refractive index (or thinned glass) is used. However, mineral lenses can break more easily, and because of this they are not recommended for children or drivers (since they are dangerous when an airbag inflates). Glass lenses are also heavy.
Mineral lenses can be ordered with transparent, tinted, self-darkening and anti-reflective coating.
Plastic lenses are definitely the preferred lenses today because they are light and durable. At high strengths, it is possible to thin the plastic lenses to make the glasses look nicer and more comfortable for the wearer. The scratch-resistance of the plastic is reinforced with a hardening coating.
Plastic lenses can be ordered with transparent, tinted, self-darkening, hardening and anti-reflective coating.
Trivex 1.53 PHD Lager is an impact-resistant plastic material well suited to children because it is unbreakable. It is especially suitable for children who play ball games and for people who need impact-resistant glasses. In terms of their vision properties, Trivexlenses are of significantly better optical quality than polycarbonate lenses. All over the world, Trivex lenses are considered to be safe lenses suitable for eye protection and protection against breakage. Here are some videos describing the properties of the Trivex material:
Comparison between regular plastic and Trivex lenses: