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1.59 PC Blue cut Bifocal Invisible Photochromic Gray HMC Optical lenses
As the name suggests, a bifocal mirror has two luminosity. Generally, it is used to see the distance, such as driving and walking; The following is to see the near luminosity, to see the near, such as reading, playing mobile phone and so on. When bifocal lens just came out, it was indeed regarded as the Gospel of myopia + presbyopia, eliminating the trouble of frequent pick and wear, but as people use, it is found that the shortcomings of bifocal lens also have many.
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1.56 Blue Cut Bifocal Flat Top Photochromic Gray HMC Optical lenses
Color-changing glasses can change color with the light, such as brown or ink in the outdoor strong light, and transparent in the indoor, can play a protective role in the eyes, especially in the prevention of ultraviolet radiation and blue light filtering is of great help.
For people with myopia who need to wear sunglasses to go out, color-changing glasses can save the burden of replacing myopic glasses and sunglasses, and can also solve the problem that some women are not easy to carry multiple glasses without pockets.
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1.59 pc Blue Cut Photochromic Gray HMC Optical lenses
We all know that lenses play a decisive role in a suitable pair of glasses, so when choosing lenses, we should make choices according to our work, life needs and working environment. For example, students, drivers, doctors, etc., such people have high visual requirements for color and distance.
Therefore, when choosing lenses, colorless and transparent lenses should be preferred.
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1.74 Blue Cut Spin Photochromic Gray HMC Optical lenses
Resin lens is the lens formed by chemical synthesis and polishing with resin as raw materials. Resin lens has obvious advantages, its weight is light, wearing more comfortable; Secondly, the resin lens has strong impact resistance and is not fragile and safer; At the same time, the resin lens also has a good light transmission; In addition, resin lenses are easy to be reprocessed to meet special needs. Finally, coupled with the innovation and improvement of coating process, resin lenses also have good wear resistance, so they have become the mainstream of lenses in the market.
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1.71 Blue Cut Spin Photochromic Gray HMC Optical lenses
The quality of substrate determines the durability of the lens and the reliability of the coating. Good substrate clear and bright, long use time and not easy to yellow; And some lenses do not use for a long time on the yellow, or even coating off. Good lens without any scratches, scratches, hairy surface, pitting, lens oblique to meet the light observation, the finish is very high. There is no spot, stone, stripe, bubble, crack inside the lens, and the light is bright.
The higher the refractive index, the thinner the lens, and the higher the price.
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1.67 Blue cut Spin Photochromic Gray HMC Optical lenses
good lens, material is the key
The material of a pair of lenses plays a decisive role in their transmittance, durability and Abbe number (the rainbow pattern on the surface of the lens). It can carry out in-depth research and development on materials, with controllable quality and excellent performance.
film layer, make the lens easy to wear
Good lens film layer can give the lens more excellent performance, not only the optical performance such as transmittance has been greatly improved, its hardness, wear resistance, durability will be greatly improved.
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1.61 Blue Cut Spin Photochromic Gray HMC Optical lenses
Resin is a hydrocarbon (hydrocarbon) exudate from plants, especially conifers, valued for other special chemical structures. Resin can be divided into two kinds of natural resin and synthetic resin, and the resin lens is the lens formed by chemical synthesis and polishing with resin as raw materials. Resin lens has obvious advantages, its weight is light, wearing more comfortable; Secondly, the resin lens has strong impact resistance and is not fragile and safer; At the same time, the resin lens also has a good light transmission; In addition, resin lenses are easy to be reprocessed to meet special needs. Finally, coupled with the innovation and improvement of coating process, resin lenses also have good wear resistance, so they have become the mainstream of lenses in the market.
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1.56 Semi Finished Single Vision Blue Cut Optical Lenses
Usually, there are six kinds of refractive index of resin lenses: 1.50, 1.56, 1.60, 1.67, 1.71 and 1.74. If you want a higher refractive index, you can only consider glass lenses, which have 1.80 and 1.90 to choose from. It’s just that glass lenses are used less often these days, although glass sheets also have lower refractive indices, such as 1.60 and 1.71.
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1.56 Blue Cut Photochromic Gray HMC Optical lenses
Lens is a transparent material with one or more curved surfaces made of optical materials such as glass or resin. After polishing, it is often assembled into glasses with a glass frame to correct the user’s vision and obtain a clear field of vision.
The thickness of the lens mainly depends on the refractive index and degree of the lens. Myopic lenses are thin in the center and thick around the edges, while hyperopic lenses are the opposite. Usually the higher the degree, the thicker the lens; The higher the refractive index, the thinner the lens
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1.59 PC Progressive Photochromic Gray HMC Optical lenses
The color-changing lens is based on the principle of photochromatic tautometry reversible, the lens can quickly darken under strong light and ultraviolet light, block strong light and absorb ultraviolet light; After returning to the dark, the lens quickly restores the colorless and transparent state to ensure the transmittance of the lens. Therefore, the color changing lens is very suitable for both indoor and outdoor use, especially in the outdoor environment to prevent strong light, ultraviolet, glare and other damage to the eyes, suitable for outdoor more, eyes sensitive to light stimulation, reduce eye fatigue. After wearing color-changing glasses, you will see more naturally and comfortably under strong light, avoid compensatory movements such as squinting, and reduce the fatigue of eyes and muscles around eyes.
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1.56 Progressive Photochromic Gray HMC Optical lenses
Optical color-changing lenses belong to daily glasses, indoor office, outdoor sports, can be worn. Especially go out on vacation, extreme workers in the beach, snow or tropical, photography, tourism, fishing enthusiasts, middle-aged and elderly people or eye photophobia, need to wear sunglasses myopia, indoor outdoor activities frequently alternate teenagers, the pursuit of fashion young groups.
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1.56 Bifocal Round Top Photochromic Gray HMC Optical lenses
The bifocal glasses are mainly suitable for the elderly to use, and can achieve near and far vision. When people get old, their eyesight will decline and their eyes will become senile. And bifocal glasses can help the elderly to see far and see near.
The dual lens is also called bifocal lens, which mainly includes flat top lens, round top lens and invisible lens.
The lenses of bifocal glasses are required to include hyperopia diopter, myopia diopter or downlight. Distant pupillary distance, near pupillary distance.
