There are various styles and materials of nearsighted discount eyeglasses online frames, and people often struggle to choose the right one. However, lenses are easy to choose, but do you know? There are also many types of materials for myopia glasses lenses.

The main raw material for glass lenses is optical glass. Excellent optical properties, not easily scratched, high refractive index. Glass lenses have good light transmittance and mechanical and chemical properties, with a constant refractive index and stable physical and chemical properties.

Glass lenses have the characteristic of being more scratch-resistant than the cheapest eyeglasses online lenses made of other materials, but their weight is also relatively heavy. Glass sheets have superior optical properties, are not easily scratched, and have a high refractive index. The higher the refractive index, the thinner the lens.

Compared with glass eyeglass lenses, resin eyeglass lenses have the advantages of smaller lens weight, lighter frame, and even the ability to directly install temple, beam, and nose support on the lens without the need for an external frame. They have a beautiful appearance and are not easily broken, making them highly favored by people.

PC lenses, typically resin discount prescription glasses lenses, are made of thermosetting materials, where the raw material is liquid and heated to form solid lenses. PC film, also known as "space film" or "universe film", is a thermoplastic material with the chemical name polycarbonate.

The raw material is solid and shaped into lenses after heating, so this type of lens will also deform when heated excessively, making it unsuitable for high humidity and heat environments. PC lenses have extremely strong toughness, so they are also known as safety lenses.

For jobs that require high and stable visual acuity, color, and distance, colorless and transparent lenses should be chosen. After selecting the frame, the shape of the lens was chosen.