Is a nose pad become green harmful?
Pure copper rust contains bacteria that affect the skin and can cause breakouts or skin irritation. High-end glasses are made of alloy materials with lead and nickel not exceeding the standard. Low-end and cheap glasses may not contain environmentally friendly alloy, which will do harm to the human body if it rusts.
Acetate frame and plastic frame
What is the difference between acetate frame and a plastic frame? Acetate frames are lighter and generally considered to be better than plastic frames. Acetate is known for its hypoallergenicity, so it is a popular choice for people with sensitive skin. Unlike some plastic or metal frames, they can cause allergic reactions.
- The manufacturing process makes the plastic frame more brittle than the acetate frame.
- If the temple does not have a metal bracket, it is difficult to adjust the plastic glasses.
- There are fewer choices of colors and patterns for plastic frame
However, you will notice that acetate frames are generally more expensive than ordinary plastic frames. Spectacle frames are daily necessities that we use for a long time. Therefore, durability is essential, and the life span of the acetate frame is longer.
Thick black frame
During that time, in the memory of every nearsighted person, there is such a pair of black frame glasses. They can be big can be small, and can be square, round. If you wear this kind of glasses, you are the most handsome boy in the whole street. Of course, black-rimmed glasses have their benefits. Many big-name fashion magazines often use them to give stars a concave look during the shoot.
Athletes wear non-prescription sunglasses.
Some people opt for non-prescription lenses for fashion reasons. Shatter-proof non-prescription glasses are popular among athletes. Cyclists wear glasses to protect their eyes from debris and to protect their eyes from the wind. Squash players may wear glasses to reduce glare on the squash court and to provide protection against ball collision or breaking up an opponent's racquet. Gun lovers can wear glasses to reduce glare in outdoor environments. Most non-prescription glasses do more than one thing, and safety is almost always a primary concern. These non-prescription sunglasses filter out harmful UV rays.
How to choose blue light blocking glasses?
While trying it on, look at the electronic screen from a distance to see if it stimulates your eyes. Holding the glasses in front of a display screen or under an LED light to see if they reflect blue light on the surface of the lens. It shows that blue-blocking glasses can block blue light. The special blue light flashlight shines on the white cardboard through the lens, the blue light that passes through the blue-blocking lens is noticeably dimmed, while the blue light that passes through the normal lens is not changed at all, which is what the blocking blue light does. You can go to a professional eyeglass shop to detect instruments through the spectrum of professional authority, and the best blue light blocking rate is between 60%-70%.
Advantages Of TR90 Frames
- Lightweight. The weight is about half the weight of the plate frame, which can reduce the burden on the bridge of the nose and ears, and it is also comfortable to wear for a long time.
- Bright colors. Compared with ordinary plastic frames, the color of TR90 frames is even better.
- Impact resistance. The TR90 frame is extremely flexible, and its good elasticity can effectively prevent damage to the eyes caused by impact during sports.
Regardless of whether it is a sheet frame or a TR90 frame, they have their own advantages. You can choose them according to your requirements, Importantly, it is comfortable to wear and good-looking.
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.
