About Plastic Frames
It is usually divided into thermoplastic plastics and thermosetting plastics. Thermoplastics can be reworked under heat. Thermosetting plastics cannot. The plastic frame is usually made of nylon or composite material. Although it is a thermoplastic material, at regular temperature will not become soft. The plastics used to make frames are not always thermoplastic, but they can almost always be softened by heating. Thermosetting plastics are usually used only for small parts.
Is blue light blocking worth it?
There are two main problems with anti-blue glasses currently on the market. One is that the place to be prevented is not preventable, and the other is that people have color casts due to wrong protection and aggravate visual fatigue. Studies have shown that our eyes are the most intolerant of blue light in the 400-440 nanometer band. Therefore, current manufacturers mainly block blue light in this band when producing anti-blue glasses. However, the blue waveband of electronic products is between 450 nanometers and 490 nanometers, so most anti-blue glasses have little protection in this waveband. In addition, the blocking rate of anti-blue glasses is 20%~30% to achieve a good anti-blue light effect, but now the blocking rate of anti-blue glasses on the market has basically reached 80%~90%. All in all, these blocking blue light glasses cannot prevent the blue light in the 450-490 nanometer band, and their high blocking rate will also cause a color shift, which makes people more likely to have eye fatigue and headache.
In daily life, the intensity of blue light is low, not enough to cause damage to the fundus, so ordinary people do not need to wear anti-blue glasses unless they are working in extremely strong light conditions or working in special environments. To protect the eyes, it is more important for people to develop good eye habits. For example, wear a pair of suitable glasses and read insufficient light and at an appropriate distance. Avoid using electronic products for a long time. Take a break for 20 to 30 seconds every 20 to 30 minutes, and look at the distance regularly. If you have dry eyes while reading the electronic screen, remember to blink to 12 times per minute. It is best to wear sunglasses when outdoors.
Pure Titanium Glasses Frame Brand - MARCWALKS
So far, the industrial structure of the company has been very perfect, and all the single products are very good in the overall quality. Among them, the single product of the pure titanium spectacle frame series has been recognized by the industry and consumers in terms of material and workmanship. The company enjoys a high status among consumers.The variety is complete and the price is reasonable.They ensure product quality. With a variety of operating characteristics and the principle of small profits, they won the trust of most customers.
How can you tell if blue light glasses work?
It can be identified in the light. Ordinary lenses have a yellowish feeling under the reflection of light, while the anti-blue lens film color has blue on the yellow-green film, which is the cause of reflecting blue light out. Check the instruction manual to verify that the lenses contain radiation-resistant materials. When wearing, you can look at the electronic screen far away, and check if there is a sense of irritation to the eyes. The biggest difference between the regular lens and the anti-blue lens is the coating layer. If you look carefully, you can see that the anti-blue lens layer is very clear. Put the anti-blue light glasses on the fully open phone screen and observe if the covered area is blue. If it is, the prevention effect is good. This is because the blue light emitted by the phone is reflected on the phone screen by the lens.
In recent years, the glasses chain has developed fastly, especially in large and medium-sized cities. The professional glasses stores use their own technical force, progressive optometry equipment, and years of store reputation, which drives the whole industry to improve the quality of products. Nowadays, with the development and expansion of the eyewear industry, eyewear chain stores have become the main force of eyewear product sales in China and even the world. Moreover, tens of thousands of people are directly or indirectly engaged in the operation or management of eyewear chains or related to them. The eyewear industry provides us with a large market and benefits.
The refractive index of the lens is related to the thickness of the lens.
The main factors that determine if a pair of finished glasses are beautiful, portable, and comfortable depending on the thickness and thinness of the processed lenses. Depending on the material, the index of refraction is different. If you just look at the refractive index, the higher the refractive index at the same degree, the thinner the lens will be. The thinner the lens will be, and the more beautiful the lens will be. However, the higher the refractive index, it is not the better. You can choose the refractive index lens suitable for yourself. But the refractive index is not the only factor that determines lens thickness. Think about the distance between your eyes and the size of the frames you choose, which can affect the thickness of the lenses you match. The larger the pupil distance, the smaller the frame, and the thinner the lens.
They have their finger on the pulse of changing fashion trends. Providing a variety of styles and shapes to choose from, and the target is to make everyone happy who is looking for new and attractive glasses. Only the best brands are available to ensure that your glasses are both stylish and durable. From elegant and sophisticated to casual and stylish, you'll find the frame to highlight your look. Designer glasses have lasting value, unique design, and durability. The whole collection has been tested that solid craftsmanship can stand the test of time and wears. They have a large selection of brand-name lenses, including professional lenses. They provide a lot of cool prescription and non-prescription sunglasses.