What is hard coating on lenses?
Lenses are mainly added in two kinds of film: anti-reflection film and hard film (and some manufacturers produce anti-fogging film and mirror film, but not common). The anti-reflective film is mainly by coating the front surface of the lens with multiple layers of transparent materials with different refractive index and thickness to reduce the excess reflected light on the surface of the lens, by using the principle of light interference. The film can be applied to both glass and resin lenses. The way of hard film plating is usually a soaking process. After many times of soaking and cleaning, soaking in an organic solution containing ultrafine silicon element for a certain time, and then keeping it at a certain temperature for 4-5 hours, the fixed polymerization process of the film has been completed. The surface wear resistance of CR-39 coating can be increased by 2-4 pH, which is similar to the hardness of optical glass lenses.
What are keyhole glasses?
Keyhole glasses have a keyhole bridge. The keyhole bridge is shaped like a keyhole and is located on one side of the nose. Bridge glasses are one of the most beloved styles in the history of optics. The keyhole bridge has the shape of a keyhole. The keyhole bridge is arguably one of the most popular eyewear features. With the rise of acetic acid frames in the 1950s, keyhole glasses became widely popular. The ductility of the new material allows for a simplified manufacturing process, thus creating room for creative experimentation in the frame development.
Adjust the nose pad
The height of the nose pad is adjusted by first holding the glasses with one hand and holding the nose pad with pliers with the other. Then the pliers are lifted up and the nose pad is moved down until the glasses are in the correct position on the face. The asymmetrical adjustment method is to first hold the frame of the eyeglasses with one hand, the other hand clamps the nasal plate with pliers. Then twist it in the direction of the correct tray position so that the surface of the tray is in contact with the two sides of the nose. Wrap one side of the lens of the glasses to be operated with a cloth first to prevent the screwdriver from slipping and scraping the lens during the operation. Don't scratch your glasses by adjusting your nose pad.
Silhouette Glasses
Slim, refined and stylish are all words that could be used to describe the signature style of Silhouette, and the company is known for its rimless glasses design. They promote rimless glasses to the boundary without limits, with no frames, hinges, and screws. It is one of the few major manufacturers of glasses frames in Europe, making all its parts and assembling the products entirely in its own factory. They have created unprecedented product quality and an unmatched reputation in the eyewear industry.
The sporty style
Sporty style frames are a little cool, full of vitality, well-designed. They pay attention to every detail, with publicity but not exaggerated feelings. With good material, they effectively prevent collision injury to your eyes in the process of movement, greatly improving safety. The style is simple and smooth, and the appearance is dynamic and fashionable, and the color collocation is diversified. With the integration of four progressive technology to better protect your eyes, they are your outdoor leisure tourism sports choice.
A Suitable Nose Pad
The Nose pad must fit the nose to the maximum extent possible. If they do not fit, the opticians have special pointed tools. It's best not to adjust the nose pad yourself. A lot of store staff are afraid to adjust the nose pad, just because it is difficult. The general store processing master will adjust the nose pad. The nose pad can be adjusted on the premise of the same rake angle.
What is the best lens material?
The world's first resin lens was made of CR-39 material, and CR-39 is still the main optical lens material in Europe and the United States. After the end of World War II, people found that compared with glass, the main lens material at that time, the light transmittance of CR-39 is high, and it can block ultraviolet light. In addition, CR-39 can be dyed, not easy to fog, and has small dispersion (CR-39's Abbe number is 58) and other benefits.
