What Are Trifocal Glasses?
Trifocal glasses and no-line progressive lenses are multi-focal glasses, meaning that their lenses offer multiple correction fields. Whether you have been wearing multi-focal glasses for a while, or you have just begun to look at options for correcting vision after 40 years old, you may have heard the terms trifocal or progressive glasses.
Trifocal glasses have three different corrective lenses within one lens to offer you intermediate, distance, and near correction. Trifocal lenses look and perform similar to bifocal lenses, with an added viewing zone to help correct vision in the intermediate field, and two visible lines where the viewing zones change.
Disadvantages of carbon fiber glasses frames
One disadvantage of carbon fiber materials is that they are more brittle, so spectacle frames will break after being bent to a certain extent, which is not as tough as metal. Carbon fiber materials are more complex to process, so carbon fiber spectacle frames are better than conventional spectacle frames. Also, it is much more expensive. If there are too cheap ones, you need to carefully consider its authenticity. In addition, the carbon fiber spectacle frames are difficult to repair once damaged.
At present, carbon fiber material has been used by many high-end eyewear brands, which shows that it has a very good effect on the improvement of product quality. The popularization of carbon fiber as an excellent material in daily necessities has a positive effect on the improvement of people's quality of life.
An unlimited discount is not reasonable.
5 discount, 3 discount, 1.5 discount, we can see that glasses category discount is lower and lower. But glasses are not consumable, like cell phones, appliances, or even less frequently than they are. Because, unlike consumables, it has an incompressible cost structure. Behind such discounts, there is sometimes the marketing strategy of raising the price of glasses first and then lowering the price.
About Prism Glasses
The refractive index of the same medium is different for different colors of light. Different colors of light travel at different speeds in the same medium. Because the same medium has a different refractive index for various monochromatic light, and the deflection angle of each monochromatic light is different when passing through a prism. Therefore, white light through a prism will separate the monochromatic light, known as dispersion. What is the prism effect of glasses? As long as there is a deviation between the visual channel of the eye and the optical center of the lens, it can produce a prism effect. Therefore, the severity of the prism effect can be used to measure whether the glasses with the correct prescription are processed correctly and reshaped correctly.
Pair Eyewear
Pair is designed for children. There are only a few styles of frames, but there are hundreds of colors and patterns on top of the frames, and the top of the frame base can change colors, from pure pink to rainbow tie-dye to NBA logos. Pair also makes limited-edition tops and works with major brands like Marvel and Harry Potter to create themed styles that allow you and your children to showcase your personality. Each frame starts at $60, including standard prescription lenses, and the frames cost $25.
The function of eyeglasses cloth
Under a powerful microscope, the fibers of the cloth are more closely arranged than those of ordinary cloth, and the material itself is softer than ordinary cloth. That's because eyeglasses under the eye are almost always coated, with each standard lens having seven layers of different functions on the front and back surfaces, to extend lens life. It can thoroughly remove the stubborn stains left on the lens to make the picture clear. It can clean all kinds of glass, resin, and other materials of glasses, glass mirrors, and other mirror surfaces, remove stains, and grease absorption.
Are yellow lenses good for night driving?
Yellow lenses are very effective even in low light conditions. They enhance contrast while you're driving. In other words, they broaden your horizons and allow you to see more cars, people, and objects on the road. Especially when you're driving at high speeds on dark roads, this widened, enhanced view can help you see more clearly. The transparent driver's glasses effect is not good. Headlight glare can be understood as dazzling light. The lens should be looked for from the angle of the stain. But the color should not be too dark to ensure safe driving at night. It is better to polarize the light. It can greatly improve the anti-glare effect.
