Acetate is a kind of thermoplastic resin obtained by esterifying acetic acid to acetic anhydride under the action of a catalyst. Acetate is resistant to water, gasoline, mineral oil, and lipids, weak alkaline solutions, and acids, excellent weather resistance, not resistant to ethanol, strong acids, and strong alkaline solutions. During thermoforming, it is very necessary to dry the material before forming. Acetate was born in the early 20th century, and was successfully trial-produced and industrialized by the UK in the early 1920s. At present, it is the second-largest variety in cellulose fiber after viscose fiber. Acetate can be used to make textiles, cigarette filters, film bases, and plastic products.
To protect the lens.
Avoid getting chemicals on your glasses, and if you do, rinse with water immediately. If there is sweat and grease on the glasses, they should be washed to avoid corrosion. Do not use clothes or towels to wipe the lenses. Rubbing the lens with a rough cloth can cause scratches on the surface of the lens. So it is best to use special glasses cloth when you wipe the lenses, and when you wipe the glasses, you must hold the glasses on one side of the frame with your hand, and then gently wipe the glasses with the glasses cloth. Remember not to overexert, otherwise, it is easy to cause frame and lens damage.
How do myopic glasses work?
The formation principle of myopia is that when the light from the outside world enters the eyeball, it is refracted by the eyeball's refractive system and cannot be accurately imprinted on the retina. The image is in front of the retina. If a concave lens is placed in front of the eye before the light enters the eye, it shifts the focus of the myopic eye from a point in front of the retina to the back, so that it lands directly on the surface of the retina. When parallel light passes through a concave lens, it diverges, meaning that it has already diverged once before entering the eye and then is refracted normally by the eye's refractive system. When the light is refracted through the eyeball, the distance of the image will be longer. So the distance of the image will be correspondingly pushed back compared to the non-divergent light. But it will just fall on the retina, and the image will be accurate in the right place.
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.
KOALAEYE blue light glasses
We take classes online, telecommute and shop online... Cloud life has become the norm for people to work and relax. While it adds convenience, it helps increase the time spent staring at electronic screens, which increases the risk of eye health damage. The latest data shows that mobile Internet users spend 144.8 hours a month on average. Blue-light-blocking glasses are becoming more and more popular. Advertisements for these glasses claim that excessive exposure to blue light can cause a series of eye problems, like eye dryness, eye fatigue, and, in severe cases, loss of vision. In order to protect your eyesight, there is a kind of blue light shielding glasses on the market, claiming to protect against computer radiation and blue light. So what can you choose to prevent blue light glasses?
The material of KOALAEYE blue light glasses has the benefits of ultra-lightweight design, wear resistance, and low friction coefficient. KOALAEYE blue light blockers (with yellow tints) are effective at blocking 100% of the harmful UV rays and relieving eye strain, especially when watching TV and computer. They always pay attention to the quality of their products.
Is it expensive to fix glasses?
Many optician shops can fix a broken pair of frames for less than $50. Some retailers, like LensCrafters, provide glasses with a one-year extended warranty for as low as $35. If you have such a warranty, you can have your glasses repaired for a fraction of the cost. Is it expensive to fix glasses? It depends on the specific situation. World Optic, for example, has led the eyeglass repair industry since 1972. World Optic combines over 90 years of eyeglass repair experience and uses cutting-edge technology to create a complete science of the process of repairing broken glasses and sunglasses from start to finish. We have to see that for every single repair, there is a specific quote for different degrees of repair and for different parts.
What are memory metal frames used for?
Bendable glasses can be used by anyone who is afraid of breaking their glasses, breaking their frames, or bending their legs. In addition, the metal has high strength and elasticity, which can be tossed around freely. It is more durable, allowing the wearers to have comfort and freedom. Don't worry about having to change your glasses every time you sleep, sit on them, or drop them. They are best suited for children.