Tungsten carbon glasses frame
Tungsten carbon material, one of the obvious advantages of this material is that it has good toughness and is ultra-lightweight. People will feel no pressure when wearing such glasses. It is good if you are a sportsperson who chooses it.
Disadvantages of pure titanium frames
The material is soft, the glasses can not be made more delicate, only the lines are thicker, in order to ensure stability and strength.Usually, when you are not wearing a pure titanium glasses frame, it is better to put them in the case of glasses, to avoid pressure deformation.
Choose a good frame material
Each pair of glasses has its own characteristics and highlights. The frame itself is an ornament, playing the role of beautification. Today's plate spectacle frames are particularly popular with all kinds of people. Work is complicated and delicate, and design is diverse. Importantly, color and luster are good, not allergic. And it doesn't fade. It is also a high-grade frame. Both the grade and the design are very advantageous. Many brand glasses are made of plates. Some are made of high-grade plates. The appearance is beautiful and stylish.
Does the phone screen have irregular color bars when wearing polarized lenses?
It is mainly the special properties of the polarizing film. The polarizer is able to see the internal stresses in the plastic, so when we usually look at the edge of the mobile phone screen, it will have a colored stripe or a black piece, which is mainly caused by the uneven edge pressure when the screen is installed. It's mostly a matter of light and shade. Wearing a polarized lens to see the LCD screen a tilt will find that the screen darkens, mainly because the polarizing lens can absorb light in a certain direction. The LCD screen is a one-way light (different from sunlight), so it is absorbed, so it is found to be dark.
Computer Protective Glasses
With the popularity of televisions and computers, electromagnetic radiation has become the No.1 killer of vision. The invention of radiation protection glasses is even more popular, and its market is also widely optimistic.
The lens design of the computer protective glasses has no side effects on vision. Refined with a high-tech vacuum ion coating, it can block 0% electromagnetic waves. The lens contains anti-radiation substances and has the function of absorbing positive charges. It can absorb low-frequency radiation microwaves and avoid potential eye fever, headache, fatigue, dryness, and other adverse symptoms caused by electromagnetic wave radiation. The penetration and absorption function of different light can resist radiation and glare, and the user will obviously feel clear and natural vision after wearing it. At present, there are mainly anti-blue lenses and anti-fatigue lenses, which can effectively prevent blue light radiation and relieve eye fatigue.
What is a progressive lens?
A progressive lens is a lens whose upper sides are used to see far, and the lower side is used to see near. The distance from the fixed distance power above the lens to the near power fixed below the lens does not change suddenly, but a gradual transition between the two through the gradual change in refractive power.
Standard progressive lenses are multifocal lenses with three observation areas, farsightedness, intermediate vision, and nearsightedness. Unlike bifocals, there are no visible lines between each viewing area. They have a seamless, invisible design, where the optical power changes 'gradually' throughout the lens. Many people confuse 'bifocal' or 'trifocal' with 'progressive' but remember that bifocals and trifocals have visible lines in the lens, while progressive lenses do not. Because progressive lenses have no lines in the lens, they are more popular multifocal lenses than bifocal lenses. However, is progressive lens good for eyes?
Identify the frames of discount glasses
Electroplating spraying refers to metal frames, all need to be plated on color. Spraying, the quality of this process, determines the quality of the frame. Glasses are not high-tech, but details like hinges -- the joints that open and close -- make a big difference between good and bad. The little screws inside, about four of them (hinges and nose pad), are important.Silk screen printing or laser engraving refers to the above logo or data, some of the silk screen, easy to sweat and fade, does not affect the use. Some laser engraving, basic will not fade, so, look at these details, can probably judge the stand or fall of the frame.