Common lens types

Some of the more lens includes the following kinds:

1, glass lenses

Glass lenses use more common than other materials, the lens more adrasion characteristics, but also the relative weight is heavy.

2, polymer resin lens

Polymer resin lens more light than glass lenses, impact resistance, but not because of its hardness, low, so more easily than glass has scratches.

3, PC lens

There is a polymer materials, often used more impact resistance of transparent window, aviation equipment, and the police mask astros helmet masked, it is only about one-tenth of the weight of the glass with the traditional resin lens, compared with only half of the weight is only, the PC lens needs with the wind resistance, use protective will get better to use in children, most limitation of glass lens, or athletes protective eyewear, PC lens also has an important characteristic that PC lens cut harmful ultraviolet effect has its shortcomings, but also contains the surface is easily scratch. Under the condition of the same dioptre high index of glass or resin lens in thickness and weight on a conventional lenses to thin and light, this feature enables caused by high myopia is very thick, the edge of users get better, improve its best to retain the glasses can be obtained using state, besides the perfect online and good production techniques, still need to user proper protection, just enough to maintain the best condition, glasses, striped and scratches can reduce light penetrates the effect, of course, also can reduce visual effect, even if the frame deformation, may also cause you to your head sideways to see clearly.

4, double light

Double light can also far and near both orthodontic vision, mainly for LaoHuaYan correction, when needed double light of distribution, lens to see the distant, lower lens used to watch a close, but with the purpose of size is near, depending on the nature of the work in close to double light roofs, usually by use of the highest probability, they only small area in the bottom of the lens as close as, work with the surrounding the lens to look afar and provide a good peripheral vision, traditional double light into a pair of glasses, light is divided into two by lens, less than half of the lens is also used as a close distance, they provide better wide closer view for a long time, close to the workers have better effect, architects, artists, accountants and other work, this lens is close to the head can reduce the swing, double light lenses could also use in, only just need to close reading correct, but in closer and inconvenience when working with glasses, will this situation applies to the object of the lens of a situation, in this part of the polish, with its classification includs glass for dioptre.

Five, three focus lens

According to the need of the person (distance vision on average about 18 inches to six feet), as far and near, use three focus lens can satisfy the demand, those in such a computer or register before the people, and for the work of a distance of vision, have special requirements such lens can satisfy the requirements on the job he eyesight.

These lenses correction effect also contains multiple range, is different in every different distance between the demarcation of the lens, the more focus lens division, may need in the very near, can see or touch via hand can feel, but, when users in the conversion by nearly to the distance, eyes still have felt very suddenly changes.

6 and gradual much focus lens

Part of the provocative and not a very clear boundaries, gradual much focus lens used gradually progressive photorefractive degree method to instantly change, this one design can avoid “jump” image, as when you use double light or annihilation, if you attempt to lens, or by far into the far to observe the object that will Gui image jump phenomena, for example, in the supermarket, you can easily incremental more carefully examine focus lens, the shopping list, you can also easily on the shelf for your products, first, wearing the initial focus lens more progressive training needs some adjustments to cooperate with frame contains how to head a proper position to meet different distance goal.

7, because of the special glasses cost /

If needed to work or hobby, you need a close eye level in the work, use more than nearly as with lens in glasses, will be very useful for its with general double light is consistent, the only difference is that in the bottom of the lens, the glasses will need professional person to know you close the distance and precise work, just enough to make your view of professional guidance and assistance to obtain precise results to meet your special needs.

8 and compound lens

For in a film with two glasses with a nearly use lens, one at the bottom of the double standard, as with the other one, the light is on top, as for special purpose, for example, when the painter to paint the walls and ceiling, this one is located in the light of double above, can let the design mix clearly see its work.

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