What are the 3 types of lenses for glasses?
What are the 3 types of lenses for glasses? If types of lens by material, they can be divided into glass lenses, resin lenses, and crystal lenses. In addition,the types of lenses can be classified by functions and spherical shapes. This article mainly talks about classifying lenses by material. 1: Glass lens. Glass is the earliest material used as glasses lens. Although the current lenses are generally resin lenses, glass lenses played an irreplaceable role in that era. The advantage of glass lens is that it is very hard and the permeability is high, but the disadvantage is that it is relatively heavy and it is the heaviest lens of all types. Applicable: acetate sunglasses , metal sunglasses. Among the more famous brands, Ray-Ban is one of the brands with the most glass lenses. 2: Resin lens. Light weight, not fragile, and safety are the biggest characteristics of optical resin materials. Its weight is about one-half of the glass lens; its impact resistance is 10 times higher th...