What are the 3 types of lenses for glasses?

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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.

eyewear lens

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.

glass lens

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 than that of glass, its chemical stability and light transmittance are also better, it absorbs ultraviolet rays and is easy to process. However, the disadvantages of resin lenses are relatively low hardness, easy scratches, and poor heat resistance. But at present, there are mature processing technologies for these shortcomings of resin lenses. As long as the surface is covered with various functional films, the above shortcomings can be greatly solved. For example, attaching a hard film can increase the hardness of the lens and make it more resistant to scratches. 

resin lens

Applicable type: Widely used in eyewear of various materials, including acetate eyewear, metal sunglasses,metal optical, titanium eyewear, injection eyewear and horn eyewear, etc.

3: Crystal lens. Crystal is a transparent quartz crystal, the main component is silicon dioxide. Its refractive index and density are higher than glass lenses. The advantages of crystal lenses: high hardness, high temperature resistance, friction resistance, and moisture resistance. The disadvantages are: high hardness, difficult processing, heavy weight, and expensive. Most of these natural crystals have impure texture and uneven color, which reduces the light transmittance. Its optical performance is not as good as glass, and it is basically not used at present.

Crystal lens

The above is the answer to what are the 3 types of lenses for glasses.If you want to know more about it, welcome to visit our website: www.bestseaeyewear.com.

As an eyewear manufacturer, the technicians in the factory will generally match the lenses according to the different materials and designs of the frames.


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