What material is good for spectacle lenses and what material is best for spectacle lenses

Essilor, Zeiss, TAG Heuer, Seiko, Kemi, Rodonstode are all very good. China's Gusu (Suzhou) is the birthplace of glasses in China, and the production of glasses in Suzhou not only has a long history, but also plays a great role in promoting the development of China's glasses industry. In the early years of Chongzhen in the Ming Dynasty (1628 AD), there was an outstanding technician in the history of Suzhou glasses, named Sun Yunqiu, the word Wenyu, and the word Sibin, originally from Wujiang.

He was diligent and studious since he was a child, and at that time he saw that people with poor eyesight were in pain, but "single-vision" mirrors and the like were inconvenient to use. So he developed a lens that could be worn on glasses. After repeated experiments, he used mechanical principles to invent and create a lens grinding machine - a gyroscope.

This kind of puller, which is the so-called orange processed by the classical method, is rotated by foot, using ore sand, white mud, brick ash, etc. as abrasives or polishing materials, and grinding the lens into a convex and concave lens to meet the needs of eye refraction. Finally, he mastered the grinding technique and used natural crystal stone to polish the lenses. At the same time, he mastered the technology of "optometry", developed presbyopia, myopia, farsightedness and other varieties and lenses of various luminosities according to people's age and different vision, and compiled a set of original optometry methods of "eye to mirror" to check the eye.

In this way, you can match glasses with your eyes, the effect is not bad at all, and it is more convenient and comfortable to wear on the face, so as to meet the needs of everyone's eyesight, which is the beginning of independent optometry glasses in China. Later, Sun Yunqiu invented and developed optical lenses for different purposes, including dozens of kinds of flower glasses, mandarin duck mirrors, magnifying glasses, multi-faceted mirrors, and illusion mirrors. Since then, the glasses made by Sun Yunqiu have become famous all over the world.

It is a pity that such a promising technical talent died of illness at the age of 33, but he left behind a scientific and technological work called "Mirror History", which played an immeasurable role in promoting the manufacturing technology of glasses in later generations. Following Sun Yunqiu, during the Qianlong and Jiaqing periods of the Qing Dynasty, Suzhou produced another talent who made glasses, named Chu Sanshan. He further developed the technique of making glasses, which was quite influential.

Due to the emergence of two outstanding technical talents in Suzhou, Sun Yunqiu and Chu Sanshan, which promoted the formation and development of Suzhou's glasses industry at that time. In 1735, there were workshops in Suzhou specializing in the production of spectacles. By the time of the Kangxi Dynasty of the Qing Dynasty, the production and sales of glasses had flourished in Beijing, Shanghai, Suzhou, Tianjin, Guangzhou and other places.

Eyewear has become a specialized commodity.

Use lenses, prisms, contact lenses, intraocular lenses, etc. to correct vision, eliminate visual fatigue, and protect or improve the eyes. There are many types of glasses, including optical glasses and contact glasses for correcting refractive errors, and intraocular lenses can be implanted in corrected aphakic eyes in addition to contact glasses. In addition, there are various protective glasses, cosmetic glasses, and visual aids for correcting low vision, all of which are thin lenses, and their degree is the reciprocal of the focal length (meters) of the lens.

For more professional answers, please contact Beijing Presaisi Instrument, product service: We have established a domestic sales network with perfect technology with professional knowledge and valuable experience in selling products for many years. In order to provide high-quality services in a more timely manner, the company has established business divisions in Northeast China, East China, Northwest China, North China and South China.

We have a vibrant high...

Spectacle lenses are made of aspherical resin.

The lens material of glasses is nothing more than this, one glass lens and one resin lens.

There are also special lenses, and there are space lenses. One of the more commonly used in clinical practice is glass lenses.

There are also plastic lenses, glass lenses and plastic lenses have their own advantages and disadvantages, glass lenses are good light transmittance, relatively stable, not easy to form scratches, and the refractive rate is relatively high.

The disadvantage of glass lenses is that the glass is relatively heavy and easy to break, so it is not recommended for children and primary school students to wear glass glasses, because broken glass glasses can easily lead to eye trauma and damage to the eyeball. The advantage of plastic lenses is that the material is relatively light and the diopter is diopter.

Of course, it's good, but it's easy to wear out.

Plastic lenses are now also available in spherical and aspherical lenses.

The difference between spherical and aspherical lenses is that aspherical lenses have better clarity and clearer vision, so most of them use aspherical lenses made of resin, which is better.

Lens selection notes:

1.Lenses are thin and thick, at the same degree, thin lenses are lighter to wear, the pressure on the bridge of the nose is lighter, and you will not feel particularly tired after wearing it for a long time, but generally the thinner the lenses, the more expensive, when purchasing, you should choose the right one for yourself.

2.Glasses will often accompany us, it is inevitable that it will be easy to encounter wear and bumping, and it is necessary to choose lenses with good wear resistance and drop resistance, such as plastic lenses or PC lenses. Generally, glass lenses are not chosen, because the safety is relatively low, and it is easy to hurt the eyes if accidentally broken.

3.The refractive index of the lens.

It is not that the higher the better, and according to the depth of the power to choose the right one, the deeper the power to choose the better the refractive index, but the best aspects also need to do what they can.

4.Lenses also have anti-blue light and non-anti-blue light, if you often need to face computer work, or often watch TV, it is recommended to choose anti-blue light lenses to reduce the damage of blue light to the eyes.

5.When fitting glasses, you need to go to a regular optical store for fitting, and you can't buy glasses casually to prevent re-injury to your eyes caused by wearing inappropriate glasses.

What is the best material for spectacle lenses, as follows:

1.Glass lens: good light transmittance, not easy to yellow. However, the weight is large, the parameters of the applicable optics are more complete, and the ** is higher, so it has been used less often.

2.Plastic lenses: Good light transmittance, light weight, is currently widely used lenses.

3.PC lens: light transmittance is also good, light weight, chemical name is polycarbonate, is a thermoplastic material. At present, the product line of international brands is relatively complete, and it has great advantages in lens design and impact resistance.

The above is what is the best material for spectacle lenses, I hope it will help you.